diff --git a/3rdparty/everest/include/everest/everest.h b/3rdparty/everest/include/everest/everest.h
index 5806500..392e792 100644
--- a/3rdparty/everest/include/everest/everest.h
+++ b/3rdparty/everest/include/everest/everest.h
@@ -96,7 +96,7 @@
                                  void *p_rng );
 
 /**
- * \brief           This function parses and processes a TLS ServerKeyExhange
+ * \brief           This function parses and processes a TLS ServerKeyExchange
  *                  payload.
  *
  *                  This is the first function used by a TLS client for ECDHE
@@ -116,7 +116,7 @@
                                  const unsigned char **buf, const unsigned char *end );
 
 /**
- * \brief           This function parses and processes a TLS ServerKeyExhange
+ * \brief           This function parses and processes a TLS ServerKeyExchange
  *                  payload.
  *
  *                  This is the first function used by a TLS client for ECDHE
diff --git a/CMakeLists.txt b/CMakeLists.txt
index cac13bd..9006c2d 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -8,7 +8,7 @@
 #     that targets are built using the proper list of include directories.
 #   + Use the PUBLIC and PRIVATE keywords to specify the scope of include
 #     directories. That way, a target linking to a library (using the
-#     target_link_librairies command) inherits from the library PUBLIC include
+#     target_link_libraries command) inherits from the library PUBLIC include
 #     directories and not from the PRIVATE ones.
 # - MBEDTLS_TARGET_PREFIX: CMake targets are designed to be alterable by calling
 #   CMake in order to avoid target name clashes, via the use of
diff --git a/ChangeLog.d/psa_raw_key_agreement-buffer_too_small.txt b/ChangeLog.d/psa_raw_key_agreement-buffer_too_small.txt
new file mode 100644
index 0000000..415c849
--- /dev/null
+++ b/ChangeLog.d/psa_raw_key_agreement-buffer_too_small.txt
@@ -0,0 +1,3 @@
+Bugfix
+   * psa_raw_key_agreement() now returns PSA_ERROR_BUFFER_TOO_SMALL when
+     applicable. Fixes #5735.
diff --git a/docs/architecture/psa-migration/strategy.md b/docs/architecture/psa-migration/strategy.md
index d63bb8e..2bb0284 100644
--- a/docs/architecture/psa-migration/strategy.md
+++ b/docs/architecture/psa-migration/strategy.md
@@ -360,7 +360,7 @@
 
 2. APIs the accept list of identifiers: for example
    `mbedtls_ssl_conf_curves()` taking a list of `mbedtls_ecp_group_id`s. This
-could be changed to accept a list of pairs (`psa_ecc_familiy_t`, size) but we
+could be changed to accept a list of pairs (`psa_ecc_family_t`, size) but we
 should probably take this opportunity to move to a identifier independent from
 the underlying crypto implementation and use TLS-specific identifiers instead
 (based on IANA values or custom enums), as is currently done in the new
diff --git a/docs/architecture/testing/driver-interface-test-strategy.md b/docs/architecture/testing/driver-interface-test-strategy.md
index 086fc1a..a726c43 100644
--- a/docs/architecture/testing/driver-interface-test-strategy.md
+++ b/docs/architecture/testing/driver-interface-test-strategy.md
@@ -87,7 +87,7 @@
 * This must be done for each possible flow, including error cases (e.g. a key creation that fails midway due to `OUT_OF_MEMORY`).
 * The recovery during `psa_crypto_init` can itself be interrupted. Test those interruptions too.
 * Two things need to be tested: the key that is being created or destroyed, and the driver's persistent storage.
-* Check both that the storage has the expected content (this can be done by e.g. using a key that is supposed to be present) and does not have any unexpected content (for keys, this can be done by checking that `psa_open_key` fails with `PSA_ERRROR_DOES_NOT_EXIST`).
+* Check both that the storage has the expected content (this can be done by e.g. using a key that is supposed to be present) and does not have any unexpected content (for keys, this can be done by checking that `psa_open_key` fails with `PSA_ERROR_DOES_NOT_EXIST`).
 
 This requires instrumenting the storage implementation, either to force it to fail at each point or to record successive storage states and replay each of them. Each `psa_its_xxx` function call is assumed to be atomic.
 
diff --git a/include/mbedtls/check_config.h b/include/mbedtls/check_config.h
index 73c50c2..bdc32e1 100644
--- a/include/mbedtls/check_config.h
+++ b/include/mbedtls/check_config.h
@@ -150,24 +150,24 @@
 #endif
 
 #if defined(MBEDTLS_PKCS12_C) && !defined(MBEDTLS_CIPHER_C)
-#error "MBEDTLS_PKCS12_C defined, but not all prerequesites"
+#error "MBEDTLS_PKCS12_C defined, but not all prerequisites"
 #endif
 
 #if defined(MBEDTLS_PKCS5_C) && (!defined(MBEDTLS_MD_C) || \
                                  !defined(MBEDTLS_CIPHER_C))
-#error "MBEDTLS_PKCS5_C defined, but not all prerequesites"
+#error "MBEDTLS_PKCS5_C defined, but not all prerequisites"
 #endif
 
 #if defined(MBEDTLS_PKCS12_C) && !defined(MBEDTLS_MD_C)
-#error "MBEDTLS_PKCS12_C defined, but not all prerequesites"
+#error "MBEDTLS_PKCS12_C defined, but not all prerequisites"
 #endif
 
 #if defined(MBEDTLS_PKCS1_V15) && !defined(MBEDTLS_MD_C)
-#error "MBEDTLS_PKCS1_V15 defined, but not all prerequesites"
+#error "MBEDTLS_PKCS1_V15 defined, but not all prerequisites"
 #endif
 
 #if defined(MBEDTLS_PKCS1_V21) && !defined(MBEDTLS_MD_C)
-#error "MBEDTLS_PKCS1_V21 defined, but not all prerequesites"
+#error "MBEDTLS_PKCS1_V21 defined, but not all prerequisites"
 #endif
 
 #if defined(MBEDTLS_ENTROPY_C) && (!defined(MBEDTLS_SHA512_C) &&      \
diff --git a/include/mbedtls/ssl.h b/include/mbedtls/ssl.h
index c882371..06860e2 100644
--- a/include/mbedtls/ssl.h
+++ b/include/mbedtls/ssl.h
@@ -1938,7 +1938,7 @@
  *
  * \note           The two most common use cases are:
  *                 - non-blocking I/O, f_recv != NULL, f_recv_timeout == NULL
- *                 - blocking I/O, f_recv == NULL, f_recv_timout != NULL
+ *                 - blocking I/O, f_recv == NULL, f_recv_timeout != NULL
  *
  * \note           For DTLS, you need to provide either a non-NULL
  *                 f_recv_timeout callback, or a f_recv that doesn't block.
@@ -3203,7 +3203,7 @@
  *
  * \note           On client, only the first call has any effect. That is,
  *                 only one client certificate can be provisioned. The
- *                 server's preferences in its CertficateRequest message will
+ *                 server's preferences in its CertificateRequest message will
  *                 be ignored and our only cert will be sent regardless of
  *                 whether it matches those preferences - the server can then
  *                 decide what it wants to do with it.
diff --git a/include/psa/crypto_extra.h b/include/psa/crypto_extra.h
index 8fb1a21..76e71bf 100644
--- a/include/psa/crypto_extra.h
+++ b/include/psa/crypto_extra.h
@@ -448,9 +448,9 @@
  *   As an exception, the public exponent 65537 is represented by an empty
  *   byte string.
  * - For DSA keys (#PSA_KEY_TYPE_DSA_PUBLIC_KEY or #PSA_KEY_TYPE_DSA_KEY_PAIR),
- *   the `Dss-Parms` format as defined by RFC 3279 &sect;2.3.2.
+ *   the `Dss-Params` format as defined by RFC 3279 &sect;2.3.2.
  *   ```
- *   Dss-Parms ::= SEQUENCE  {
+ *   Dss-Params ::= SEQUENCE  {
  *      p       INTEGER,
  *      q       INTEGER,
  *      g       INTEGER
@@ -466,9 +466,9 @@
  *      g               INTEGER,                    -- generator, g
  *      q               INTEGER,                    -- factor of p-1
  *      j               INTEGER OPTIONAL,           -- subgroup factor
- *      validationParms ValidationParms OPTIONAL
+ *      validationParams ValidationParams OPTIONAL
  *   }
- *   ValidationParms ::= SEQUENCE {
+ *   ValidationParams ::= SEQUENCE {
  *      seed            BIT STRING,
  *      pgenCounter     INTEGER
  *   }
diff --git a/include/psa/crypto_sizes.h b/include/psa/crypto_sizes.h
index 9bbcb34..1024d6b 100644
--- a/include/psa/crypto_sizes.h
+++ b/include/psa/crypto_sizes.h
@@ -739,7 +739,7 @@
  *      subjectPublicKey     BIT STRING  } -- contains DSAPublicKey
  * AlgorithmIdentifier  ::=  SEQUENCE  {
  *      algorithm               OBJECT IDENTIFIER,
- *      parameters              Dss-Parms  } -- SEQUENCE of 3 INTEGERs
+ *      parameters              Dss-Params  } -- SEQUENCE of 3 INTEGERs
  * DSAPublicKey  ::=  INTEGER -- public key, Y
  *
  * - 3 * 4 bytes of SEQUENCE overhead;
diff --git a/library/ccm.c b/library/ccm.c
index e062678..3edfba3 100644
--- a/library/ccm.c
+++ b/library/ccm.c
@@ -99,7 +99,7 @@
 
 #define CCM_STATE__CLEAR                0
 #define CCM_STATE__STARTED              (1 << 0)
-#define CCM_STATE__LENGHTS_SET          (1 << 1)
+#define CCM_STATE__LENGTHS_SET          (1 << 1)
 #define CCM_STATE__AUTH_DATA_STARTED    (1 << 2)
 #define CCM_STATE__AUTH_DATA_FINISHED   (1 << 3)
 #define CCM_STATE__ERROR                (1 << 4)
@@ -147,7 +147,7 @@
     /* length calulcation can be done only after both
      * mbedtls_ccm_starts() and mbedtls_ccm_set_lengths() have been executed
      */
-    if( !(ctx->state & CCM_STATE__STARTED) || !(ctx->state & CCM_STATE__LENGHTS_SET) )
+    if( !(ctx->state & CCM_STATE__STARTED) || !(ctx->state & CCM_STATE__LENGTHS_SET) )
         return 0;
 
     /* CCM expects non-empty tag.
@@ -260,7 +260,7 @@
     ctx->tag_len = tag_len;
     ctx->processed = 0;
 
-    ctx->state |= CCM_STATE__LENGHTS_SET;
+    ctx->state |= CCM_STATE__LENGTHS_SET;
     return ccm_calculate_first_block_if_ready(ctx);
 }
 
diff --git a/library/ctr_drbg.c b/library/ctr_drbg.c
index 93a7cdc..23ea07b 100644
--- a/library/ctr_drbg.c
+++ b/library/ctr_drbg.c
@@ -815,7 +815,7 @@
                         return( 1 );                        \
                     }
 
-#define SELF_TEST_OUPUT_DISCARD_LENGTH 64
+#define SELF_TEST_OUTPUT_DISCARD_LENGTH 64
 
 /*
  * Checkup routine
@@ -841,7 +841,7 @@
                                 (void *) entropy_source_pr,
                                 pers_pr, MBEDTLS_CTR_DRBG_KEYSIZE ) );
     mbedtls_ctr_drbg_set_prediction_resistance( &ctx, MBEDTLS_CTR_DRBG_PR_ON );
-    CHK( mbedtls_ctr_drbg_random( &ctx, buf, SELF_TEST_OUPUT_DISCARD_LENGTH ) );
+    CHK( mbedtls_ctr_drbg_random( &ctx, buf, SELF_TEST_OUTPUT_DISCARD_LENGTH ) );
     CHK( mbedtls_ctr_drbg_random( &ctx, buf, sizeof( result_pr ) ) );
     CHK( memcmp( buf, result_pr, sizeof( result_pr ) ) );
 
@@ -866,7 +866,7 @@
                                 (void *) entropy_source_nopr,
                                 pers_nopr, MBEDTLS_CTR_DRBG_KEYSIZE ) );
     CHK( mbedtls_ctr_drbg_reseed( &ctx, NULL, 0 ) );
-    CHK( mbedtls_ctr_drbg_random( &ctx, buf, SELF_TEST_OUPUT_DISCARD_LENGTH ) );
+    CHK( mbedtls_ctr_drbg_random( &ctx, buf, SELF_TEST_OUTPUT_DISCARD_LENGTH ) );
     CHK( mbedtls_ctr_drbg_random( &ctx, buf, sizeof( result_nopr ) ) );
     CHK( memcmp( buf, result_nopr, sizeof( result_nopr ) ) );
 
diff --git a/library/ecdh.c b/library/ecdh.c
index 8be7f19..cc1340c 100644
--- a/library/ecdh.c
+++ b/library/ecdh.c
@@ -399,7 +399,7 @@
 }
 
 /*
- * Read the ServerKeyExhange parameters (RFC 4492)
+ * Read the ServerKeyExchange parameters (RFC 4492)
  *      struct {
  *          ECParameters    curve_params;
  *          ECPoint         public;
diff --git a/library/mps_common.h b/library/mps_common.h
index d20776f..668876c 100644
--- a/library/mps_common.h
+++ b/library/mps_common.h
@@ -51,7 +51,7 @@
  *  the function's behavior is entirely undefined.
  *  In addition to state integrity, all MPS structures have a more refined
  *  notion of abstract state that the API operates on. For example, all layers
- *  have a notion of 'abtract read state' which indicates if incoming data has
+ *  have a notion of 'abstract read state' which indicates if incoming data has
  *  been passed to the user, e.g. through mps_l2_read_start() for Layer 2
  *  or mps_l3_read() in Layer 3. After such a call, it doesn't make sense to
  *  call these reading functions again until the incoming data has been
diff --git a/library/psa_crypto.c b/library/psa_crypto.c
index 635981d..c3af7aa 100644
--- a/library/psa_crypto.c
+++ b/library/psa_crypto.c
@@ -5766,6 +5766,22 @@
     if( status != PSA_SUCCESS )
         goto exit;
 
+    /* PSA_RAW_KEY_AGREEMENT_OUTPUT_SIZE() is in general an upper bound
+     * for the output size. The PSA specification only guarantees that this
+     * function works if output_size >= PSA_RAW_KEY_AGREEMENT_OUTPUT_SIZE(...),
+     * but it might be nice to allow smaller buffers if the output fits.
+     * At the time of writing this comment, with only ECDH implemented,
+     * PSA_RAW_KEY_AGREEMENT_OUTPUT_SIZE() is exact so the point is moot.
+     * If FFDH is implemented, PSA_RAW_KEY_AGREEMENT_OUTPUT_SIZE() can easily
+     * be exact for it as well. */
+    size_t expected_length =
+        PSA_RAW_KEY_AGREEMENT_OUTPUT_SIZE( slot->attr.type, slot->attr.bits );
+    if( output_size < expected_length )
+    {
+        status = PSA_ERROR_BUFFER_TOO_SMALL;
+        goto exit;
+    }
+
     status = psa_key_agreement_raw_internal( alg, slot,
                                              peer_key, peer_key_length,
                                              output, output_size,
diff --git a/library/ssl_tls13_server.c b/library/ssl_tls13_server.c
index 769ed48..2aa62bf 100644
--- a/library/ssl_tls13_server.c
+++ b/library/ssl_tls13_server.c
@@ -412,7 +412,7 @@
      */
 
     /*
-     * Minimal length ( with everything empty and extensions ommitted ) is
+     * Minimal length ( with everything empty and extensions omitted ) is
      * 2 + 32 + 1 + 2 + 1 = 38 bytes. Check that first, so that we can
      * read at least up to session id length without worrying.
      */
diff --git a/programs/ssl/ssl_test_lib.h b/programs/ssl/ssl_test_lib.h
index 48da1bf..03349ba 100644
--- a/programs/ssl/ssl_test_lib.h
+++ b/programs/ssl/ssl_test_lib.h
@@ -241,7 +241,7 @@
 int key_opaque_alg_parse( const char *arg, const char **alg1, const char **alg2 );
 
 #if defined(MBEDTLS_USE_PSA_CRYPTO)
-/** Parse given opaque key algoritms to obtain psa algs and usage
+/** Parse given opaque key algorithms to obtain psa algs and usage
  *  that will be passed to mbedtls_pk_wrap_as_opaque().
  *
  *
diff --git a/tests/include/test/helpers.h b/tests/include/test/helpers.h
index ef32cdf..080b46e 100644
--- a/tests/include/test/helpers.h
+++ b/tests/include/test/helpers.h
@@ -155,6 +155,48 @@
                         unsigned long long value1, unsigned long long value2 );
 
 /**
+ * \brief           Record the current test case as a failure based
+ *                  on comparing two unsigned integers.
+ *
+ *                  This function is usually called via the macro
+ *                  #TEST_LE_U.
+ *
+ * \param test      Description of the failure or assertion that failed. This
+ *                  MUST be a string literal. This normally has the form
+ *                  "EXPR1 <= EXPR2" where EXPR1 has the value \p value1
+ *                  and EXPR2 has the value \p value2.
+ * \param line_no   Line number where the failure originated.
+ * \param filename  Filename where the failure originated.
+ * \param value1    The first value to compare.
+ * \param value2    The second value to compare.
+ *
+ * \return          \c 1 if \p value1 <= \p value2, otherwise \c 0.
+ */
+int mbedtls_test_le_u( const char *test, int line_no, const char* filename,
+                       unsigned long long value1, unsigned long long value2 );
+
+/**
+ * \brief           Record the current test case as a failure based
+ *                  on comparing two signed integers.
+ *
+ *                  This function is usually called via the macro
+ *                  #TEST_LE_S.
+ *
+ * \param test      Description of the failure or assertion that failed. This
+ *                  MUST be a string literal. This normally has the form
+ *                  "EXPR1 <= EXPR2" where EXPR1 has the value \p value1
+ *                  and EXPR2 has the value \p value2.
+ * \param line_no   Line number where the failure originated.
+ * \param filename  Filename where the failure originated.
+ * \param value1    The first value to compare.
+ * \param value2    The second value to compare.
+ *
+ * \return          \c 1 if \p value1 <= \p value2, otherwise \c 0.
+ */
+int mbedtls_test_le_s( const char *test, int line_no, const char* filename,
+                       long long value1, long long value2 );
+
+/**
  * \brief          This function decodes the hexadecimal representation of
  *                 data.
  *
diff --git a/tests/include/test/macros.h b/tests/include/test/macros.h
index a88b2e8..8535b93 100644
--- a/tests/include/test/macros.h
+++ b/tests/include/test/macros.h
@@ -89,6 +89,32 @@
             goto exit;                                                  \
     } while( 0 )
 
+/** Evaluate two unsigned integer expressions and fail the test case
+ * if they are not in increasing order (left <= right).
+ *
+ * \param expr1     An integral-typed expression to evaluate.
+ * \param expr2     Another integral-typed expression to evaluate.
+ */
+#define TEST_LE_U( expr1, expr2 )                                       \
+    do {                                                                \
+        if( ! mbedtls_test_le_u( #expr1 " <= " #expr2, __LINE__, __FILE__, \
+                                 expr1, expr2 ) )                      \
+            goto exit;                                                  \
+    } while( 0 )
+
+/** Evaluate two signed integer expressions and fail the test case
+ * if they are not in increasing order (left <= right).
+ *
+ * \param expr1     An integral-typed expression to evaluate.
+ * \param expr2     Another integral-typed expression to evaluate.
+ */
+#define TEST_LE_S( expr1, expr2 )                                       \
+    do {                                                                \
+        if( ! mbedtls_test_le_s( #expr1 " <= " #expr2, __LINE__, __FILE__, \
+                                 expr1, expr2 ) )                      \
+            goto exit;                                                  \
+    } while( 0 )
+
 /** Allocate memory dynamically and fail the test case if this fails.
  * The allocated memory will be filled with zeros.
  *
diff --git a/tests/scripts/test_psa_compliance.py b/tests/scripts/test_psa_compliance.py
index 55529c8..7d06db1 100755
--- a/tests/scripts/test_psa_compliance.py
+++ b/tests/scripts/test_psa_compliance.py
@@ -47,7 +47,7 @@
 #
 # Web URL: https://github.com/bensze01/psa-arch-tests/tree/fixes-for-mbedtls-3
 PSA_ARCH_TESTS_REPO = 'https://github.com/bensze01/psa-arch-tests.git'
-PSA_ARCH_TESTS_REF = 'fix-pr-5139-3'
+PSA_ARCH_TESTS_REF = 'fix-pr-5736'
 
 #pylint: disable=too-many-branches,too-many-statements
 def main():
diff --git a/tests/src/helpers.c b/tests/src/helpers.c
index ec4d84e..8f4d7f2 100644
--- a/tests/src/helpers.c
+++ b/tests/src/helpers.c
@@ -122,6 +122,52 @@
     return( 0 );
 }
 
+int mbedtls_test_le_u( const char *test, int line_no, const char* filename,
+                       unsigned long long value1, unsigned long long value2 )
+{
+    if( value1 <= value2 )
+        return( 1 );
+    if( mbedtls_test_info.result == MBEDTLS_TEST_RESULT_FAILED )
+    {
+        /* We've already recorded the test as having failed. Don't
+         * overwrite any previous information about the failure. */
+        return( 0 );
+    }
+    mbedtls_test_fail( test, line_no, filename );
+    (void) mbedtls_snprintf( mbedtls_test_info.line1,
+                             sizeof( mbedtls_test_info.line1 ),
+                             "lhs = 0x%016llx = %llu",
+                             value1, value1 );
+    (void) mbedtls_snprintf( mbedtls_test_info.line2,
+                             sizeof( mbedtls_test_info.line2 ),
+                             "rhs = 0x%016llx = %llu",
+                             value2, value2 );
+    return( 0 );
+}
+
+int mbedtls_test_le_s( const char *test, int line_no, const char* filename,
+                       long long value1, long long value2 )
+{
+    if( value1 <= value2 )
+        return( 1 );
+    if( mbedtls_test_info.result == MBEDTLS_TEST_RESULT_FAILED )
+    {
+        /* We've already recorded the test as having failed. Don't
+         * overwrite any previous information about the failure. */
+        return( 0 );
+    }
+    mbedtls_test_fail( test, line_no, filename );
+    (void) mbedtls_snprintf( mbedtls_test_info.line1,
+                             sizeof( mbedtls_test_info.line1 ),
+                             "lhs = 0x%016llx = %lld",
+                             (unsigned long long) value1, value1 );
+    (void) mbedtls_snprintf( mbedtls_test_info.line2,
+                             sizeof( mbedtls_test_info.line2 ),
+                             "rhs = 0x%016llx = %lld",
+                             (unsigned long long) value2, value2 );
+    return( 0 );
+}
+
 int mbedtls_test_unhexify( unsigned char *obuf,
                            size_t obufmax,
                            const char *ibuf,
diff --git a/tests/suites/test_suite_psa_crypto.function b/tests/suites/test_suite_psa_crypto.function
index 8dd8e39..0bfabb1 100644
--- a/tests/suites/test_suite_psa_crypto.function
+++ b/tests/suites/test_suite_psa_crypto.function
@@ -396,12 +396,12 @@
     if( is_encrypt )
     {
         final_output_size = PSA_AEAD_FINISH_OUTPUT_SIZE( key_type, alg );
-        TEST_ASSERT( final_output_size <= PSA_AEAD_FINISH_OUTPUT_MAX_SIZE );
+        TEST_LE_U( final_output_size, PSA_AEAD_FINISH_OUTPUT_MAX_SIZE );
     }
     else
     {
         final_output_size = PSA_AEAD_VERIFY_OUTPUT_SIZE( key_type, alg );
-        TEST_ASSERT( final_output_size <= PSA_AEAD_VERIFY_OUTPUT_MAX_SIZE );
+        TEST_LE_U( final_output_size, PSA_AEAD_VERIFY_OUTPUT_MAX_SIZE );
     }
 
     ASSERT_ALLOC( final_data, final_output_size );
@@ -557,18 +557,18 @@
         output_length += tag_length;
 
         TEST_EQUAL( output_length,
-                      PSA_AEAD_ENCRYPT_OUTPUT_SIZE( key_type, alg,
-                                                    input_data->len ) );
-        TEST_ASSERT( output_length <=
-                      PSA_AEAD_ENCRYPT_OUTPUT_MAX_SIZE( input_data->len ) );
+                    PSA_AEAD_ENCRYPT_OUTPUT_SIZE( key_type, alg,
+                                                  input_data->len ) );
+        TEST_LE_U( output_length,
+                   PSA_AEAD_ENCRYPT_OUTPUT_MAX_SIZE( input_data->len ) );
     }
     else
     {
        TEST_EQUAL( output_length,
                       PSA_AEAD_DECRYPT_OUTPUT_SIZE( key_type, alg,
                                                     input_data->len ) );
-       TEST_ASSERT( output_length <=
-                      PSA_AEAD_DECRYPT_OUTPUT_MAX_SIZE( input_data->len ) );
+       TEST_LE_U( output_length,
+                  PSA_AEAD_DECRYPT_OUTPUT_MAX_SIZE( input_data->len ) );
     }
 
 
@@ -721,7 +721,7 @@
     /* Check that the length for a truncated MAC always fits in the algorithm
      * encoding. The shifted mask is the maximum truncated value. The
      * untruncated algorithm may be one byte larger. */
-    TEST_ASSERT( PSA_MAC_MAX_SIZE <= 1 + max_truncated_mac_size );
+    TEST_LE_U( PSA_MAC_MAX_SIZE, 1 + max_truncated_mac_size );
 }
 /* END_CASE */
 
@@ -965,7 +965,7 @@
      * and export_size. On errors, the exported length must be 0. */
     TEST_ASSERT( exported_length != INVALID_EXPORT_LENGTH );
     TEST_ASSERT( status == PSA_SUCCESS || exported_length == 0 );
-    TEST_ASSERT( exported_length <= export_size );
+    TEST_LE_U( exported_length, export_size );
 
     TEST_ASSERT( mem_is_char( exported + exported_length, 0,
                               export_size - exported_length ) );
@@ -1000,10 +1000,10 @@
                          reexported, reexported_length );
         PSA_ASSERT( psa_destroy_key( key2 ) );
     }
-    TEST_ASSERT( exported_length <=
+    TEST_LE_U( exported_length,
              PSA_EXPORT_KEY_OUTPUT_SIZE( type,
                                          psa_get_key_bits( &got_attributes ) ) );
-    TEST_ASSERT( exported_length <= PSA_EXPORT_KEY_PAIR_MAX_SIZE );
+    TEST_LE_U( exported_length, PSA_EXPORT_KEY_PAIR_MAX_SIZE );
 
 destroy:
     /* Destroy the key */
@@ -1065,12 +1065,12 @@
         size_t bits;
         PSA_ASSERT( psa_get_key_attributes( key, &attributes ) );
         bits = psa_get_key_bits( &attributes );
-        TEST_ASSERT( expected_public_key->len <=
-                     PSA_EXPORT_KEY_OUTPUT_SIZE( public_type, bits ) );
-        TEST_ASSERT( expected_public_key->len <=
-                     PSA_EXPORT_PUBLIC_KEY_OUTPUT_SIZE( public_type, bits ) );
-        TEST_ASSERT( expected_public_key->len <=
-                     PSA_EXPORT_PUBLIC_KEY_MAX_SIZE );
+        TEST_LE_U( expected_public_key->len,
+                   PSA_EXPORT_KEY_OUTPUT_SIZE( public_type, bits ) );
+        TEST_LE_U( expected_public_key->len,
+                   PSA_EXPORT_PUBLIC_KEY_OUTPUT_SIZE( public_type, bits ) );
+        TEST_LE_U( expected_public_key->len,
+                   PSA_EXPORT_PUBLIC_KEY_MAX_SIZE );
         ASSERT_COMPARE( expected_public_key->x, expected_public_key->len,
                         exported, exported_length );
     }
@@ -1441,8 +1441,8 @@
     size_t tag_length = tag_length_arg;
     size_t output_length;
 
-    TEST_ASSERT( nonce_length <= sizeof( nonce ) );
-    TEST_ASSERT( tag_length <= sizeof( tag ) );
+    TEST_LE_U( nonce_length, sizeof( nonce ) );
+    TEST_LE_U( tag_length, sizeof( tag ) );
 
     PSA_ASSERT( psa_crypto_init( ) );
 
@@ -2077,7 +2077,7 @@
     status = psa_hash_compute( alg, input->x, input->len,
                                output, output_size, &output_length );
     TEST_EQUAL( status, expected_status );
-    TEST_ASSERT( output_length <= output_size );
+    TEST_LE_U( output_length, output_size );
 
     /* Hash Compute, multi-part */
     status = psa_hash_setup( &operation, alg );
@@ -2089,7 +2089,7 @@
             status = psa_hash_finish( &operation, output, output_size,
                                       &output_length );
             if( status == PSA_SUCCESS )
-                TEST_ASSERT( output_length <= output_size );
+                TEST_LE_U( output_length, output_size );
             else
                 TEST_EQUAL( status, expected_status );
         }
@@ -2769,7 +2769,7 @@
         expected_mac->len + 1,
     };
 
-    TEST_ASSERT( mac_buffer_size <= PSA_MAC_MAX_SIZE );
+    TEST_LE_U( mac_buffer_size, PSA_MAC_MAX_SIZE );
     /* We expect PSA_MAC_LENGTH to be exact. */
     TEST_ASSERT( expected_mac->len == mac_buffer_size );
 
@@ -2847,7 +2847,7 @@
     psa_key_attributes_t attributes = PSA_KEY_ATTRIBUTES_INIT;
     uint8_t *perturbed_mac = NULL;
 
-    TEST_ASSERT( expected_mac->len <= PSA_MAC_MAX_SIZE );
+    TEST_LE_U( expected_mac->len, PSA_MAC_MAX_SIZE );
 
     PSA_ASSERT( psa_crypto_init( ) );
 
@@ -3320,14 +3320,14 @@
     PSA_ASSERT( psa_crypto_init( ) );
 
     /* Validate size macros */
-    TEST_ASSERT( ciphertext->len <=
-                 PSA_CIPHER_ENCRYPT_OUTPUT_SIZE( key_type, alg, plaintext->len ) );
-    TEST_ASSERT( PSA_CIPHER_ENCRYPT_OUTPUT_SIZE( key_type, alg, plaintext->len ) <=
+    TEST_LE_U( ciphertext->len,
+               PSA_CIPHER_ENCRYPT_OUTPUT_SIZE( key_type, alg, plaintext->len ) );
+    TEST_LE_U( PSA_CIPHER_ENCRYPT_OUTPUT_SIZE( key_type, alg, plaintext->len ),
                  PSA_CIPHER_ENCRYPT_OUTPUT_MAX_SIZE( plaintext->len ) );
-    TEST_ASSERT( plaintext->len <=
-                 PSA_CIPHER_DECRYPT_OUTPUT_SIZE( key_type, alg, ciphertext->len ) );
-    TEST_ASSERT( PSA_CIPHER_DECRYPT_OUTPUT_SIZE( key_type, alg, ciphertext->len ) <=
-                 PSA_CIPHER_DECRYPT_OUTPUT_MAX_SIZE( ciphertext->len ) );
+    TEST_LE_U( plaintext->len,
+               PSA_CIPHER_DECRYPT_OUTPUT_SIZE( key_type, alg, ciphertext->len ) );
+    TEST_LE_U( PSA_CIPHER_DECRYPT_OUTPUT_SIZE( key_type, alg, ciphertext->len ),
+               PSA_CIPHER_DECRYPT_OUTPUT_MAX_SIZE( ciphertext->len ) );
 
 
     /* Set up key and output buffer */
@@ -3367,7 +3367,7 @@
                                    plaintext->x, plaintext->len,
                                    output, output_buffer_size,
                                    &length ) );
-    TEST_ASSERT( length <= output_buffer_size );
+    TEST_LE_U( length, output_buffer_size );
     output_length += length;
     PSA_ASSERT( psa_cipher_finish( &operation,
                                    output + output_length,
@@ -3385,7 +3385,7 @@
                                    ciphertext->x, ciphertext->len,
                                    output, output_buffer_size,
                                    &length ) );
-    TEST_ASSERT( length <= output_buffer_size );
+    TEST_LE_U( length, output_buffer_size );
     output_length += length;
     PSA_ASSERT( psa_cipher_finish( &operation,
                                    output + output_length,
@@ -3499,10 +3499,10 @@
        the output is not possible. Validating with multipart encryption. */
     PSA_ASSERT( psa_cipher_encrypt( key, alg, input->x, input->len, output1,
                                     output1_buffer_size, &output1_length ) );
-    TEST_ASSERT( output1_length <=
-                 PSA_CIPHER_ENCRYPT_OUTPUT_SIZE( key_type, alg, input->len ) );
-    TEST_ASSERT( output1_length <=
-                 PSA_CIPHER_ENCRYPT_OUTPUT_MAX_SIZE( input->len ) );
+    TEST_LE_U( output1_length,
+               PSA_CIPHER_ENCRYPT_OUTPUT_SIZE( key_type, alg, input->len ) );
+    TEST_LE_U( output1_length,
+               PSA_CIPHER_ENCRYPT_OUTPUT_MAX_SIZE( input->len ) );
 
     PSA_ASSERT( psa_cipher_encrypt_setup( &operation, key, alg ) );
     PSA_ASSERT( psa_cipher_set_iv( &operation, output1, iv_size ) );
@@ -3511,20 +3511,20 @@
                                    input->x, input->len,
                                    output2, output2_buffer_size,
                                    &function_output_length ) );
-    TEST_ASSERT( function_output_length <=
-                 PSA_CIPHER_UPDATE_OUTPUT_SIZE( key_type, alg, input->len ) );
-    TEST_ASSERT( function_output_length <=
-                 PSA_CIPHER_UPDATE_OUTPUT_MAX_SIZE( input->len ) );
+    TEST_LE_U( function_output_length,
+               PSA_CIPHER_UPDATE_OUTPUT_SIZE( key_type, alg, input->len ) );
+    TEST_LE_U( function_output_length,
+               PSA_CIPHER_UPDATE_OUTPUT_MAX_SIZE( input->len ) );
     output2_length += function_output_length;
 
     PSA_ASSERT( psa_cipher_finish( &operation,
                                    output2 + output2_length,
                                    output2_buffer_size - output2_length,
                                    &function_output_length ) );
-    TEST_ASSERT( function_output_length <=
-                 PSA_CIPHER_FINISH_OUTPUT_SIZE( key_type, alg ) );
-    TEST_ASSERT( function_output_length <=
-                 PSA_CIPHER_FINISH_OUTPUT_MAX_SIZE );
+    TEST_LE_U( function_output_length,
+               PSA_CIPHER_FINISH_OUTPUT_SIZE( key_type, alg ) );
+    TEST_LE_U( function_output_length,
+               PSA_CIPHER_FINISH_OUTPUT_MAX_SIZE );
     output2_length += function_output_length;
 
     PSA_ASSERT( psa_cipher_abort( &operation ) );
@@ -3584,15 +3584,15 @@
                          PSA_CIPHER_FINISH_OUTPUT_SIZE( key_type, alg );
     ASSERT_ALLOC( output, output_buffer_size );
 
-    TEST_ASSERT( first_part_size <= input->len );
+    TEST_LE_U( first_part_size, input->len );
     PSA_ASSERT( psa_cipher_update( &operation, input->x, first_part_size,
                                    output, output_buffer_size,
                                    &function_output_length ) );
     TEST_ASSERT( function_output_length == output1_length );
-    TEST_ASSERT( function_output_length <=
-                 PSA_CIPHER_UPDATE_OUTPUT_SIZE( key_type, alg, first_part_size ) );
-    TEST_ASSERT( function_output_length <=
-                 PSA_CIPHER_UPDATE_OUTPUT_MAX_SIZE( first_part_size) );
+    TEST_LE_U( function_output_length,
+               PSA_CIPHER_UPDATE_OUTPUT_SIZE( key_type, alg, first_part_size ) );
+    TEST_LE_U( function_output_length,
+               PSA_CIPHER_UPDATE_OUTPUT_MAX_SIZE( first_part_size) );
     total_output_length += function_output_length;
 
     if( first_part_size < input->len )
@@ -3605,12 +3605,12 @@
                                        output_buffer_size - total_output_length,
                                        &function_output_length ) );
         TEST_ASSERT( function_output_length == output2_length );
-        TEST_ASSERT( function_output_length <=
-                     PSA_CIPHER_UPDATE_OUTPUT_SIZE( key_type,
-                                                    alg,
-                                                    input->len - first_part_size ) );
-        TEST_ASSERT( function_output_length <=
-                     PSA_CIPHER_UPDATE_OUTPUT_MAX_SIZE( input->len ) );
+        TEST_LE_U( function_output_length,
+                   PSA_CIPHER_UPDATE_OUTPUT_SIZE( key_type,
+                                                  alg,
+                                                  input->len - first_part_size ) );
+        TEST_LE_U( function_output_length,
+                   PSA_CIPHER_UPDATE_OUTPUT_MAX_SIZE( input->len ) );
         total_output_length += function_output_length;
     }
 
@@ -3619,10 +3619,10 @@
                                   output + total_output_length ),
                                 output_buffer_size - total_output_length,
                                 &function_output_length );
-    TEST_ASSERT( function_output_length <=
-                 PSA_CIPHER_FINISH_OUTPUT_SIZE( key_type, alg ) );
-    TEST_ASSERT( function_output_length <=
-                 PSA_CIPHER_FINISH_OUTPUT_MAX_SIZE );
+    TEST_LE_U( function_output_length,
+               PSA_CIPHER_FINISH_OUTPUT_SIZE( key_type, alg ) );
+    TEST_LE_U( function_output_length,
+               PSA_CIPHER_FINISH_OUTPUT_MAX_SIZE );
     total_output_length += function_output_length;
     TEST_EQUAL( status, expected_status );
 
@@ -3686,16 +3686,16 @@
                          PSA_CIPHER_FINISH_OUTPUT_SIZE( key_type, alg );
     ASSERT_ALLOC( output, output_buffer_size );
 
-    TEST_ASSERT( first_part_size <= input->len );
+    TEST_LE_U( first_part_size, input->len );
     PSA_ASSERT( psa_cipher_update( &operation,
                                    input->x, first_part_size,
                                    output, output_buffer_size,
                                    &function_output_length ) );
     TEST_ASSERT( function_output_length == output1_length );
-    TEST_ASSERT( function_output_length <=
-                 PSA_CIPHER_UPDATE_OUTPUT_SIZE( key_type, alg, first_part_size ) );
-    TEST_ASSERT( function_output_length <=
-                 PSA_CIPHER_UPDATE_OUTPUT_MAX_SIZE( first_part_size ) );
+    TEST_LE_U( function_output_length,
+               PSA_CIPHER_UPDATE_OUTPUT_SIZE( key_type, alg, first_part_size ) );
+    TEST_LE_U( function_output_length,
+               PSA_CIPHER_UPDATE_OUTPUT_MAX_SIZE( first_part_size ) );
     total_output_length += function_output_length;
 
     if( first_part_size < input->len )
@@ -3708,12 +3708,12 @@
                                        output_buffer_size - total_output_length,
                                        &function_output_length ) );
         TEST_ASSERT( function_output_length == output2_length );
-        TEST_ASSERT( function_output_length <=
-                     PSA_CIPHER_UPDATE_OUTPUT_SIZE( key_type,
-                                                    alg,
-                                                    input->len - first_part_size ) );
-        TEST_ASSERT( function_output_length <=
-                     PSA_CIPHER_UPDATE_OUTPUT_MAX_SIZE( input->len ) );
+        TEST_LE_U( function_output_length,
+                   PSA_CIPHER_UPDATE_OUTPUT_SIZE( key_type,
+                                                  alg,
+                                                  input->len - first_part_size ) );
+        TEST_LE_U( function_output_length,
+                   PSA_CIPHER_UPDATE_OUTPUT_MAX_SIZE( input->len ) );
         total_output_length += function_output_length;
     }
 
@@ -3722,10 +3722,10 @@
                                   output + total_output_length ),
                                 output_buffer_size - total_output_length,
                                 &function_output_length );
-    TEST_ASSERT( function_output_length <=
-                 PSA_CIPHER_FINISH_OUTPUT_SIZE( key_type, alg ) );
-    TEST_ASSERT( function_output_length <=
-                 PSA_CIPHER_FINISH_OUTPUT_MAX_SIZE );
+    TEST_LE_U( function_output_length,
+               PSA_CIPHER_FINISH_OUTPUT_SIZE( key_type, alg ) );
+    TEST_LE_U( function_output_length,
+               PSA_CIPHER_FINISH_OUTPUT_MAX_SIZE );
     total_output_length += function_output_length;
     TEST_EQUAL( status, expected_status );
 
@@ -3897,10 +3897,10 @@
 
     PSA_ASSERT( psa_cipher_decrypt( key, alg, input, input_buffer_size, output,
                                     output_buffer_size, &output_length ) );
-    TEST_ASSERT( output_length <=
-                 PSA_CIPHER_DECRYPT_OUTPUT_SIZE( key_type, alg, input_buffer_size ) );
-    TEST_ASSERT( output_length <=
-                 PSA_CIPHER_DECRYPT_OUTPUT_MAX_SIZE( input_buffer_size ) );
+    TEST_LE_U( output_length,
+               PSA_CIPHER_DECRYPT_OUTPUT_SIZE( key_type, alg, input_buffer_size ) );
+    TEST_LE_U( output_length,
+               PSA_CIPHER_DECRYPT_OUTPUT_MAX_SIZE( input_buffer_size ) );
 
     ASSERT_COMPARE( expected_output->x, expected_output->len,
                     output, output_length );
@@ -3943,10 +3943,10 @@
     PSA_ASSERT( psa_cipher_encrypt( key, alg, input->x, input->len,
                                     output1, output1_size,
                                     &output1_length ) );
-    TEST_ASSERT( output1_length <=
-                 PSA_CIPHER_ENCRYPT_OUTPUT_SIZE( key_type, alg, input->len ) );
-    TEST_ASSERT( output1_length <=
-                 PSA_CIPHER_ENCRYPT_OUTPUT_MAX_SIZE( input->len ) );
+    TEST_LE_U( output1_length,
+               PSA_CIPHER_ENCRYPT_OUTPUT_SIZE( key_type, alg, input->len ) );
+    TEST_LE_U( output1_length,
+               PSA_CIPHER_ENCRYPT_OUTPUT_MAX_SIZE( input->len ) );
 
     output2_size = output1_length;
     ASSERT_ALLOC( output2, output2_size );
@@ -3954,10 +3954,10 @@
     PSA_ASSERT( psa_cipher_decrypt( key, alg, output1, output1_length,
                                     output2, output2_size,
                                     &output2_length ) );
-    TEST_ASSERT( output2_length <=
-                 PSA_CIPHER_DECRYPT_OUTPUT_SIZE( key_type, alg, output1_length ) );
-    TEST_ASSERT( output2_length <=
-                 PSA_CIPHER_DECRYPT_OUTPUT_MAX_SIZE( output1_length ) );
+    TEST_LE_U( output2_length,
+               PSA_CIPHER_DECRYPT_OUTPUT_SIZE( key_type, alg, output1_length ) );
+    TEST_LE_U( output2_length,
+               PSA_CIPHER_DECRYPT_OUTPUT_MAX_SIZE( output1_length ) );
 
     ASSERT_COMPARE( input->x, input->len, output2, output2_length );
 
@@ -4014,19 +4014,19 @@
     }
 
     output1_buffer_size = PSA_CIPHER_ENCRYPT_OUTPUT_SIZE( key_type, alg, input->len );
-    TEST_ASSERT( output1_buffer_size <=
-                 PSA_CIPHER_ENCRYPT_OUTPUT_MAX_SIZE( input->len ) );
+    TEST_LE_U( output1_buffer_size,
+               PSA_CIPHER_ENCRYPT_OUTPUT_MAX_SIZE( input->len ) );
     ASSERT_ALLOC( output1, output1_buffer_size );
 
-    TEST_ASSERT( first_part_size <= input->len );
+    TEST_LE_U( first_part_size, input->len );
 
     PSA_ASSERT( psa_cipher_update( &operation1, input->x, first_part_size,
                                    output1, output1_buffer_size,
                                    &function_output_length ) );
-    TEST_ASSERT( function_output_length <=
-                 PSA_CIPHER_UPDATE_OUTPUT_SIZE( key_type, alg, first_part_size ) );
-    TEST_ASSERT( function_output_length <=
-                 PSA_CIPHER_UPDATE_OUTPUT_MAX_SIZE( first_part_size ) );
+    TEST_LE_U( function_output_length,
+               PSA_CIPHER_UPDATE_OUTPUT_SIZE( key_type, alg, first_part_size ) );
+    TEST_LE_U( function_output_length,
+               PSA_CIPHER_UPDATE_OUTPUT_MAX_SIZE( first_part_size ) );
     output1_length += function_output_length;
 
     PSA_ASSERT( psa_cipher_update( &operation1,
@@ -4034,31 +4034,31 @@
                                    input->len - first_part_size,
                                    output1, output1_buffer_size,
                                    &function_output_length ) );
-    TEST_ASSERT( function_output_length <=
-                 PSA_CIPHER_UPDATE_OUTPUT_SIZE( key_type,
-                                                alg,
-                                                input->len - first_part_size ) );
-    TEST_ASSERT( function_output_length <=
-                 PSA_CIPHER_UPDATE_OUTPUT_MAX_SIZE( input->len - first_part_size ) );
+    TEST_LE_U( function_output_length,
+               PSA_CIPHER_UPDATE_OUTPUT_SIZE( key_type,
+                                              alg,
+                                              input->len - first_part_size ) );
+    TEST_LE_U( function_output_length,
+               PSA_CIPHER_UPDATE_OUTPUT_MAX_SIZE( input->len - first_part_size ) );
     output1_length += function_output_length;
 
     PSA_ASSERT( psa_cipher_finish( &operation1,
                                    output1 + output1_length,
                                    output1_buffer_size - output1_length,
                                    &function_output_length ) );
-    TEST_ASSERT( function_output_length <=
-                 PSA_CIPHER_FINISH_OUTPUT_SIZE( key_type, alg ) );
-    TEST_ASSERT( function_output_length <=
-                 PSA_CIPHER_FINISH_OUTPUT_MAX_SIZE );
+    TEST_LE_U( function_output_length,
+               PSA_CIPHER_FINISH_OUTPUT_SIZE( key_type, alg ) );
+    TEST_LE_U( function_output_length,
+               PSA_CIPHER_FINISH_OUTPUT_MAX_SIZE );
     output1_length += function_output_length;
 
     PSA_ASSERT( psa_cipher_abort( &operation1 ) );
 
     output2_buffer_size = output1_length;
-    TEST_ASSERT( output2_buffer_size <=
-                 PSA_CIPHER_DECRYPT_OUTPUT_SIZE( key_type, alg, output1_length ) );
-    TEST_ASSERT( output2_buffer_size <=
-                 PSA_CIPHER_DECRYPT_OUTPUT_MAX_SIZE( output1_length ) );
+    TEST_LE_U( output2_buffer_size,
+               PSA_CIPHER_DECRYPT_OUTPUT_SIZE( key_type, alg, output1_length ) );
+    TEST_LE_U( output2_buffer_size,
+               PSA_CIPHER_DECRYPT_OUTPUT_MAX_SIZE( output1_length ) );
     ASSERT_ALLOC( output2, output2_buffer_size );
 
     if( iv_length > 0 )
@@ -4070,10 +4070,10 @@
     PSA_ASSERT( psa_cipher_update( &operation2, output1, first_part_size,
                                    output2, output2_buffer_size,
                                    &function_output_length ) );
-    TEST_ASSERT( function_output_length <=
-                 PSA_CIPHER_UPDATE_OUTPUT_SIZE( key_type, alg, first_part_size ) );
-    TEST_ASSERT( function_output_length <=
-                 PSA_CIPHER_UPDATE_OUTPUT_MAX_SIZE( first_part_size ) );
+    TEST_LE_U( function_output_length,
+               PSA_CIPHER_UPDATE_OUTPUT_SIZE( key_type, alg, first_part_size ) );
+    TEST_LE_U( function_output_length,
+               PSA_CIPHER_UPDATE_OUTPUT_MAX_SIZE( first_part_size ) );
     output2_length += function_output_length;
 
     PSA_ASSERT( psa_cipher_update( &operation2,
@@ -4081,22 +4081,22 @@
                                    output1_length - first_part_size,
                                    output2, output2_buffer_size,
                                    &function_output_length ) );
-    TEST_ASSERT( function_output_length <=
-                 PSA_CIPHER_UPDATE_OUTPUT_SIZE( key_type,
-                                                alg,
-                                                output1_length - first_part_size ) );
-    TEST_ASSERT( function_output_length <=
-                 PSA_CIPHER_UPDATE_OUTPUT_MAX_SIZE( output1_length - first_part_size ) );
+    TEST_LE_U( function_output_length,
+               PSA_CIPHER_UPDATE_OUTPUT_SIZE( key_type,
+                                              alg,
+                                              output1_length - first_part_size ) );
+    TEST_LE_U( function_output_length,
+               PSA_CIPHER_UPDATE_OUTPUT_MAX_SIZE( output1_length - first_part_size ) );
     output2_length += function_output_length;
 
     PSA_ASSERT( psa_cipher_finish( &operation2,
                                    output2 + output2_length,
                                    output2_buffer_size - output2_length,
                                    &function_output_length ) );
-    TEST_ASSERT( function_output_length <=
-                 PSA_CIPHER_FINISH_OUTPUT_SIZE( key_type, alg ) );
-    TEST_ASSERT( function_output_length <=
-                 PSA_CIPHER_FINISH_OUTPUT_MAX_SIZE );
+    TEST_LE_U( function_output_length,
+               PSA_CIPHER_FINISH_OUTPUT_SIZE( key_type, alg ) );
+    TEST_LE_U( function_output_length,
+               PSA_CIPHER_FINISH_OUTPUT_MAX_SIZE );
     output2_length += function_output_length;
 
     PSA_ASSERT( psa_cipher_abort( &operation2 ) );
@@ -4154,8 +4154,8 @@
     {
         TEST_EQUAL( output_size,
                     PSA_AEAD_ENCRYPT_OUTPUT_SIZE( key_type, alg, input_data->len ) );
-        TEST_ASSERT( output_size <=
-                     PSA_AEAD_ENCRYPT_OUTPUT_MAX_SIZE( input_data->len ) );
+        TEST_LE_U( output_size,
+                   PSA_AEAD_ENCRYPT_OUTPUT_MAX_SIZE( input_data->len ) );
     }
     ASSERT_ALLOC( output_data, output_size );
 
@@ -4187,8 +4187,8 @@
         TEST_EQUAL( input_data->len,
                     PSA_AEAD_DECRYPT_OUTPUT_SIZE( key_type, alg, output_length ) );
 
-        TEST_ASSERT( input_data->len <=
-                     PSA_AEAD_DECRYPT_OUTPUT_MAX_SIZE( output_length ) );
+        TEST_LE_U( input_data->len,
+                   PSA_AEAD_DECRYPT_OUTPUT_MAX_SIZE( output_length ) );
 
         TEST_EQUAL( psa_aead_decrypt( key, alg,
                                       nonce->x, nonce->len,
@@ -4246,8 +4246,8 @@
      * should be exact. */
     TEST_EQUAL( output_size,
                 PSA_AEAD_ENCRYPT_OUTPUT_SIZE( key_type, alg, input_data->len ) );
-    TEST_ASSERT( output_size <=
-                 PSA_AEAD_ENCRYPT_OUTPUT_MAX_SIZE( input_data->len ) );
+    TEST_LE_U( output_size,
+               PSA_AEAD_ENCRYPT_OUTPUT_MAX_SIZE( input_data->len ) );
     ASSERT_ALLOC( output_data, output_size );
 
     status = psa_aead_encrypt( key, alg,
@@ -4317,8 +4317,8 @@
          * should be exact. */
         TEST_EQUAL( output_size,
                     PSA_AEAD_DECRYPT_OUTPUT_SIZE( key_type, alg, input_data->len ) );
-        TEST_ASSERT( output_size <=
-                     PSA_AEAD_DECRYPT_OUTPUT_MAX_SIZE( input_data->len ) );
+        TEST_LE_U( output_size,
+                   PSA_AEAD_DECRYPT_OUTPUT_MAX_SIZE( input_data->len ) );
     }
     ASSERT_ALLOC( output_data, output_size );
 
@@ -4579,7 +4579,7 @@
 
     ciphertext_size = PSA_AEAD_FINISH_OUTPUT_SIZE( key_type, alg );
 
-    TEST_ASSERT( ciphertext_size <= PSA_AEAD_FINISH_OUTPUT_MAX_SIZE );
+    TEST_LE_U( ciphertext_size, PSA_AEAD_FINISH_OUTPUT_MAX_SIZE );
 
     ASSERT_ALLOC( ciphertext, ciphertext_size );
 
@@ -4608,7 +4608,7 @@
         TEST_EQUAL( actual_nonce_length, PSA_AEAD_NONCE_LENGTH( key_type,
                                                                 alg ) );
 
-    TEST_ASSERT( actual_nonce_length <= PSA_AEAD_NONCE_MAX_SIZE );
+    TEST_LE_U( actual_nonce_length, PSA_AEAD_NONCE_MAX_SIZE );
 
     if( expected_status == PSA_SUCCESS )
     {
@@ -4683,7 +4683,7 @@
 
     ciphertext_size = PSA_AEAD_FINISH_OUTPUT_SIZE( key_type, alg );
 
-    TEST_ASSERT( ciphertext_size <= PSA_AEAD_FINISH_OUTPUT_MAX_SIZE );
+    TEST_LE_U( ciphertext_size, PSA_AEAD_FINISH_OUTPUT_MAX_SIZE );
 
     ASSERT_ALLOC( ciphertext, ciphertext_size );
 
@@ -5121,7 +5121,7 @@
 
     tag_length = PSA_AEAD_TAG_LENGTH( key_type, key_bits, alg );
 
-    TEST_ASSERT( tag_length <= PSA_AEAD_TAG_MAX_SIZE );
+    TEST_LE_U( tag_length, PSA_AEAD_TAG_MAX_SIZE );
 
     output_size = PSA_AEAD_UPDATE_OUTPUT_SIZE( key_type, alg, input_data->len );
 
@@ -5129,7 +5129,7 @@
 
     finish_output_size = PSA_AEAD_FINISH_OUTPUT_SIZE( key_type, alg );
 
-    TEST_ASSERT( finish_output_size <= PSA_AEAD_FINISH_OUTPUT_MAX_SIZE );
+    TEST_LE_U( finish_output_size, PSA_AEAD_FINISH_OUTPUT_MAX_SIZE );
 
     ASSERT_ALLOC( final_data, finish_output_size );
 
@@ -5969,7 +5969,7 @@
     signature_size = PSA_SIGN_OUTPUT_SIZE( key_type,
                                                       key_bits, alg );
     TEST_ASSERT( signature_size != 0 );
-    TEST_ASSERT( signature_size <= PSA_SIGNATURE_MAX_SIZE );
+    TEST_LE_U( signature_size, PSA_SIGNATURE_MAX_SIZE );
     ASSERT_ALLOC( signature, signature_size );
 
     /* Perform the signature. */
@@ -6029,7 +6029,7 @@
      * whatever it is, it should be less than signature_size, so that
      * if the caller tries to read *signature_length bytes without
      * checking the error code then they don't overflow a buffer. */
-    TEST_ASSERT( signature_length <= signature_size );
+    TEST_LE_U( signature_length, signature_size );
 
 exit:
     psa_reset_key_attributes( &attributes );
@@ -6068,7 +6068,7 @@
     signature_size = PSA_SIGN_OUTPUT_SIZE( key_type,
                                                       key_bits, alg );
     TEST_ASSERT( signature_size != 0 );
-    TEST_ASSERT( signature_size <= PSA_SIGNATURE_MAX_SIZE );
+    TEST_LE_U( signature_size, PSA_SIGNATURE_MAX_SIZE );
     ASSERT_ALLOC( signature, signature_size );
 
     /* Perform the signature. */
@@ -6077,7 +6077,7 @@
                                signature, signature_size,
                                &signature_length ) );
     /* Check that the signature length looks sensible. */
-    TEST_ASSERT( signature_length <= signature_size );
+    TEST_LE_U( signature_length, signature_size );
     TEST_ASSERT( signature_length > 0 );
 
     /* Use the library to verify that the signature is correct. */
@@ -6120,7 +6120,7 @@
     psa_algorithm_t alg = alg_arg;
     psa_key_attributes_t attributes = PSA_KEY_ATTRIBUTES_INIT;
 
-    TEST_ASSERT( signature_data->len <= PSA_SIGNATURE_MAX_SIZE );
+    TEST_LE_U( signature_data->len, PSA_SIGNATURE_MAX_SIZE );
 
     PSA_ASSERT( psa_crypto_init( ) );
 
@@ -6205,7 +6205,7 @@
 
     signature_size = PSA_SIGN_OUTPUT_SIZE( key_type, key_bits, alg );
     TEST_ASSERT( signature_size != 0 );
-    TEST_ASSERT( signature_size <= PSA_SIGNATURE_MAX_SIZE );
+    TEST_LE_U( signature_size, PSA_SIGNATURE_MAX_SIZE );
     ASSERT_ALLOC( signature, signature_size );
 
     PSA_ASSERT( psa_sign_message( key, alg,
@@ -6264,7 +6264,7 @@
      * whatever it is, it should be less than signature_size, so that
      * if the caller tries to read *signature_length bytes without
      * checking the error code then they don't overflow a buffer. */
-    TEST_ASSERT( signature_length <= signature_size );
+    TEST_LE_U( signature_length, signature_size );
 
 exit:
     psa_reset_key_attributes( &attributes );
@@ -6303,14 +6303,14 @@
 
     signature_size = PSA_SIGN_OUTPUT_SIZE( key_type, key_bits, alg );
     TEST_ASSERT( signature_size != 0 );
-    TEST_ASSERT( signature_size <= PSA_SIGNATURE_MAX_SIZE );
+    TEST_LE_U( signature_size, PSA_SIGNATURE_MAX_SIZE );
     ASSERT_ALLOC( signature, signature_size );
 
     PSA_ASSERT( psa_sign_message( key, alg,
                                   input_data->x, input_data->len,
                                   signature, signature_size,
                                   &signature_length ) );
-    TEST_ASSERT( signature_length <= signature_size );
+    TEST_LE_U( signature_length, signature_size );
     TEST_ASSERT( signature_length > 0 );
 
     PSA_ASSERT( psa_verify_message( key, alg,
@@ -6350,7 +6350,7 @@
     psa_algorithm_t alg = alg_arg;
     psa_key_attributes_t attributes = PSA_KEY_ATTRIBUTES_INIT;
 
-    TEST_ASSERT( signature_data->len <= PSA_SIGNATURE_MAX_SIZE );
+    TEST_LE_U( signature_data->len, PSA_SIGNATURE_MAX_SIZE );
 
     PSA_ASSERT( psa_crypto_init( ) );
 
@@ -6444,7 +6444,7 @@
     key_bits = psa_get_key_bits( &attributes );
 
     output_size = PSA_ASYMMETRIC_ENCRYPT_OUTPUT_SIZE( key_type, key_bits, alg );
-    TEST_ASSERT( output_size <= PSA_ASYMMETRIC_ENCRYPT_OUTPUT_MAX_SIZE );
+    TEST_LE_U( output_size, PSA_ASYMMETRIC_ENCRYPT_OUTPUT_MAX_SIZE );
     ASSERT_ALLOC( output, output_size );
 
     /* Encrypt the input */
@@ -6518,13 +6518,13 @@
     key_bits = psa_get_key_bits( &attributes );
 
     output_size = PSA_ASYMMETRIC_ENCRYPT_OUTPUT_SIZE( key_type, key_bits, alg );
-    TEST_ASSERT( output_size <= PSA_ASYMMETRIC_ENCRYPT_OUTPUT_MAX_SIZE );
+    TEST_LE_U( output_size, PSA_ASYMMETRIC_ENCRYPT_OUTPUT_MAX_SIZE );
     ASSERT_ALLOC( output, output_size );
 
     output2_size = input_data->len;
-    TEST_ASSERT( output2_size <=
-                 PSA_ASYMMETRIC_DECRYPT_OUTPUT_SIZE( key_type, key_bits, alg ) );
-    TEST_ASSERT( output2_size <= PSA_ASYMMETRIC_DECRYPT_OUTPUT_MAX_SIZE );
+    TEST_LE_U( output2_size,
+               PSA_ASYMMETRIC_DECRYPT_OUTPUT_SIZE( key_type, key_bits, alg ) );
+    TEST_LE_U( output2_size, PSA_ASYMMETRIC_DECRYPT_OUTPUT_MAX_SIZE );
     ASSERT_ALLOC( output2, output2_size );
 
     /* We test encryption by checking that encrypt-then-decrypt gives back
@@ -6537,7 +6537,7 @@
                                         &output_length ) );
     /* We don't know what ciphertext length to expect, but check that
      * it looks sensible. */
-    TEST_ASSERT( output_length <= output_size );
+    TEST_LE_U( output_length, output_size );
 
     PSA_ASSERT( psa_asymmetric_decrypt( key, alg,
                                         output, output_length,
@@ -6592,7 +6592,7 @@
 
     /* Determine the maximum ciphertext length */
     output_size = PSA_ASYMMETRIC_DECRYPT_OUTPUT_SIZE( key_type, key_bits, alg );
-    TEST_ASSERT( output_size <= PSA_ASYMMETRIC_DECRYPT_OUTPUT_MAX_SIZE );
+    TEST_LE_U( output_size, PSA_ASYMMETRIC_DECRYPT_OUTPUT_MAX_SIZE );
     ASSERT_ALLOC( output, output_size );
 
     PSA_ASSERT( psa_asymmetric_decrypt( key, alg,
@@ -6665,7 +6665,7 @@
                                             output, output_size,
                                             &output_length );
     TEST_EQUAL( actual_status, expected_status );
-    TEST_ASSERT( output_length <= output_size );
+    TEST_LE_U( output_length, output_size );
 
     /* If the label is empty, the test framework puts a non-null pointer
      * in label->x. Test that a null pointer works as well. */
@@ -6680,7 +6680,7 @@
                                                 output, output_size,
                                                 &output_length );
         TEST_EQUAL( actual_status, expected_status );
-        TEST_ASSERT( output_length <= output_size );
+        TEST_LE_U( output_length, output_size );
     }
 
 exit:
@@ -7021,8 +7021,8 @@
                         if( PSA_ALG_IS_TLS12_PSK_TO_MS( alg ) )
                         {
                             PSA_ASSERT( psa_get_key_attributes( keys[i], &attributes1 ) );
-                            TEST_ASSERT( PSA_BITS_TO_BYTES( psa_get_key_bits( &attributes1 ) ) <=
-                                        PSA_TLS12_PSK_TO_MS_PSK_MAX_SIZE );
+                            TEST_LE_U( PSA_BITS_TO_BYTES( psa_get_key_bits( &attributes1 ) ),
+                                       PSA_TLS12_PSK_TO_MS_PSK_MAX_SIZE );
                         }
 
                         PSA_ASSERT( psa_key_derivation_input_key( &operation,
@@ -7550,7 +7550,6 @@
     size_t output_length = ~0;
     size_t key_bits;
 
-    ASSERT_ALLOC( output, expected_output->len );
     PSA_ASSERT( psa_crypto_init( ) );
 
     psa_set_key_usage_flags( &attributes, PSA_KEY_USAGE_DERIVE );
@@ -7563,16 +7562,47 @@
     PSA_ASSERT( psa_get_key_attributes( our_key, &attributes ) );
     key_bits = psa_get_key_bits( &attributes );
 
+    /* Validate size macros */
+    TEST_LE_U( expected_output->len,
+               PSA_RAW_KEY_AGREEMENT_OUTPUT_SIZE( our_key_type, key_bits ) );
+    TEST_LE_U( PSA_RAW_KEY_AGREEMENT_OUTPUT_SIZE( our_key_type, key_bits ),
+               PSA_RAW_KEY_AGREEMENT_OUTPUT_MAX_SIZE );
+
+    /* Good case with exact output size */
+    ASSERT_ALLOC( output, expected_output->len );
     PSA_ASSERT( psa_raw_key_agreement( alg, our_key,
                                        peer_key_data->x, peer_key_data->len,
                                        output, expected_output->len,
                                        &output_length ) );
     ASSERT_COMPARE( output, output_length,
                     expected_output->x, expected_output->len );
-    TEST_ASSERT( output_length <=
-                 PSA_RAW_KEY_AGREEMENT_OUTPUT_SIZE( our_key_type, key_bits ) );
-    TEST_ASSERT( output_length <=
-                 PSA_RAW_KEY_AGREEMENT_OUTPUT_MAX_SIZE );
+    mbedtls_free( output );
+    output = NULL;
+    output_length = ~0;
+
+    /* Larger buffer */
+    ASSERT_ALLOC( output, expected_output->len + 1 );
+    PSA_ASSERT( psa_raw_key_agreement( alg, our_key,
+                                       peer_key_data->x, peer_key_data->len,
+                                       output, expected_output->len + 1,
+                                       &output_length ) );
+    ASSERT_COMPARE( output, output_length,
+                    expected_output->x, expected_output->len );
+    mbedtls_free( output );
+    output = NULL;
+    output_length = ~0;
+
+    /* Buffer too small */
+    ASSERT_ALLOC( output, expected_output->len - 1 );
+    TEST_EQUAL( psa_raw_key_agreement( alg, our_key,
+                                       peer_key_data->x, peer_key_data->len,
+                                       output, expected_output->len - 1,
+                                       &output_length ),
+                PSA_ERROR_BUFFER_TOO_SMALL );
+    /* Not required by the spec, but good robustness */
+    TEST_LE_U( output_length, expected_output->len - 1 );
+    mbedtls_free( output );
+    output = NULL;
 
 exit:
     mbedtls_free( output );