diff --git a/scripts/abi_check.py b/scripts/abi_check.py
index 533aaea..e19f2c0 100755
--- a/scripts/abi_check.py
+++ b/scripts/abi_check.py
@@ -107,7 +107,7 @@
         )
         self.log.debug(worktree_output.decode("utf-8"))
         version.commit = subprocess.check_output(
-            [self.git_command, "rev-parse", worktree_rev],
+            [self.git_command, "rev-parse", "HEAD"],
             cwd=git_worktree_path,
             stderr=subprocess.STDOUT
         ).decode("ascii").rstrip()
diff --git a/tests/data_files/Makefile b/tests/data_files/Makefile
index 512bb29..8694d01 100644
--- a/tests/data_files/Makefile
+++ b/tests/data_files/Makefile
@@ -48,17 +48,19 @@
 all_intermediate += test-ca.req.sha256
 
 test-ca.crt: $(test_ca_key_file_rsa) test-ca.req.sha256
-	$(MBEDTLS_CERT_WRITE) is_ca=1 serial=3 request_file=test-ca.req.sha256 selfsign=1 issuer_name="C=NL,O=PolarSSL,CN=PolarSSL Test CA" issuer_key=$(test_ca_key_file_rsa) issuer_pwd=$(test_ca_pwd_rsa) not_before=20110212144400 not_after=20210212144400 md=SHA1 version=3 output_file=$@
-test-ca.der: test-ca.crt
+	$(MBEDTLS_CERT_WRITE) is_ca=1 serial=3 request_file=test-ca.req.sha256 selfsign=1 issuer_name="C=NL,O=PolarSSL,CN=PolarSSL Test CA" issuer_key=$(test_ca_key_file_rsa) issuer_pwd=$(test_ca_pwd_rsa) not_before=20190210144400 not_after=20290210144400 md=SHA1 version=3 output_file=$@
+all_final += test-ca.crt
+
+test-ca.crt.der: test-ca.crt
 	$(OPENSSL) x509 -inform PEM -in $< -outform DER -out $@
-all_final += test-ca.crt test-ca.der
+all_final += test-ca.der
 
 test-ca-sha1.crt: $(test_ca_key_file_rsa) test-ca.req.sha256
-	$(MBEDTLS_CERT_WRITE) is_ca=1 serial=3 request_file=test-ca.req.sha256 selfsign=1 issuer_name="C=NL,O=PolarSSL,CN=PolarSSL Test CA" issuer_key=$(test_ca_key_file_rsa) issuer_pwd=$(test_ca_pwd_rsa) not_before=20110212144400 not_after=20210212144400 md=SHA1 version=3 output_file=$@
+	$(MBEDTLS_CERT_WRITE) is_ca=1 serial=3 request_file=test-ca.req.sha256 selfsign=1 issuer_name="C=NL,O=PolarSSL,CN=PolarSSL Test CA" issuer_key=$(test_ca_key_file_rsa) issuer_pwd=$(test_ca_pwd_rsa) not_before=20190210144400 not_after=20290210144400 md=SHA1 version=3 output_file=$@
 all_final += test-ca-sha1.crt
 
 test-ca-sha256.crt: $(test_ca_key_file_rsa) test-ca.req.sha256
-	$(MBEDTLS_CERT_WRITE) is_ca=1 serial=3 request_file=test-ca.req.sha256 selfsign=1 issuer_name="C=NL,O=PolarSSL,CN=PolarSSL Test CA" issuer_key=$(test_ca_key_file_rsa) issuer_pwd=$(test_ca_pwd_rsa) not_before=20110212144400 not_after=20210212144400 md=SHA256 version=3 output_file=$@
+	$(MBEDTLS_CERT_WRITE) is_ca=1 serial=3 request_file=test-ca.req.sha256 selfsign=1 issuer_name="C=NL,O=PolarSSL,CN=PolarSSL Test CA" issuer_key=$(test_ca_key_file_rsa) issuer_pwd=$(test_ca_pwd_rsa) not_before=20190210144400 not_after=20290210144400 md=SHA256 version=3 output_file=$@
 all_final += test-ca-sha256.crt
 
 cli_crt_key_file_rsa = cli-rsa.key
@@ -68,10 +70,10 @@
 all_intermediate += cli-rsa.csr
 
 cli-rsa-sha1.crt: cli-rsa.csr
-	$(MBEDTLS_CERT_WRITE) request_file=$< serial=4 issuer_crt=$(test_ca_crt) issuer_key=$(test_ca_key_file_rsa) issuer_pwd=$(test_ca_pwd_rsa) not_before=20110212144406 not_after=20210212144406 md=SHA1 version=3 output_file=$@
+	$(MBEDTLS_CERT_WRITE) request_file=$< serial=4 issuer_crt=$(test_ca_crt) issuer_key=$(test_ca_key_file_rsa) issuer_pwd=$(test_ca_pwd_rsa) not_before=20190210144406 not_after=20290210144406 md=SHA1 version=3 output_file=$@
 
 cli-rsa-sha256.crt: cli-rsa.csr
-	$(MBEDTLS_CERT_WRITE) request_file=$< serial=4 issuer_crt=$(test_ca_crt) issuer_key=$(test_ca_key_file_rsa) issuer_pwd=$(test_ca_pwd_rsa) not_before=20110212144406 not_after=20210212144406 md=SHA256 version=3 output_file=$@
+	$(MBEDTLS_CERT_WRITE) request_file=$< serial=4 issuer_crt=$(test_ca_crt) issuer_key=$(test_ca_key_file_rsa) issuer_pwd=$(test_ca_pwd_rsa) not_before=20190210144406 not_after=20290210144406 md=SHA256 version=3 output_file=$@
 all_final += cli-rsa-sha256.crt
 
 test_ca_int_rsa1 = test-int-ca.crt
@@ -671,13 +673,15 @@
 # server2*
 
 server2.crt: server2.req.sha256
-	$(MBEDTLS_CERT_WRITE) request_file=server2.req.sha256 serial=2 issuer_crt=$(test_ca_crt) issuer_key=$(test_ca_key_file_rsa) issuer_pwd=$(test_ca_pwd_rsa) not_before=20110212144406 not_after=20210212144406 md=SHA1 version=3 output_file=$@
+	$(MBEDTLS_CERT_WRITE) request_file=server2.req.sha256 serial=2 issuer_crt=$(test_ca_crt) issuer_key=$(test_ca_key_file_rsa) issuer_pwd=$(test_ca_pwd_rsa) not_before=20190210144406 not_after=20290210144406 md=SHA1 version=3 output_file=$@
+all_final += server2.crt
+
 server2.der: server2.crt
 	$(OPENSSL) x509 -inform PEM -in $< -outform DER -out $@
-all_final += server2.crt server2.der
+all_final += server2.der
 
 server2-sha256.crt: server2.req.sha256
-	$(MBEDTLS_CERT_WRITE) request_file=server2.req.sha256 serial=2 issuer_crt=$(test_ca_crt) issuer_key=$(test_ca_key_file_rsa) issuer_pwd=$(test_ca_pwd_rsa) not_before=20110212144406 not_after=20210212144406 md=SHA256 version=3 output_file=$@
+	$(MBEDTLS_CERT_WRITE) request_file=server2.req.sha256 serial=2 issuer_crt=$(test_ca_crt) issuer_key=$(test_ca_key_file_rsa) issuer_pwd=$(test_ca_pwd_rsa) not_before=20190210144406 not_after=20290210144406 md=SHA256 version=3 output_file=$@
 all_final += server2-sha256.crt
 
 
diff --git a/tests/data_files/rsa_pkcs1_1024_clear.pem b/tests/data_files/rsa_pkcs1_1024_clear.pem
index 2d1a176..e26eac3 100644
--- a/tests/data_files/rsa_pkcs1_1024_clear.pem
+++ b/tests/data_files/rsa_pkcs1_1024_clear.pem
@@ -1,15 +1,15 @@
 -----BEGIN RSA PRIVATE KEY-----
-MIICXgIBAAKBgQCvBX05buhPt1/btcKxPH/lplSqiqJHC1Qe4f6wsS0lx5cRUxJJ
-4RKWKAQtu7bBINFENSTvTA5uHYlW7rIHevEjSd3u5USDvAbCxhlIzQKyAueWrr2U
-06fL+FnCwYGcMky4K5zTTt4mOiq//kcz8HeGnoZg99aDTaU9aQ73mF9rwwIDAQAB
-AoGBAIdL8P/C8qcdFGcd3QFxyVTX/b9QKB5PbZnqDh68+C+qWOe1lf+yk9Gr4X8R
-CzfEjMDzbDfoTYdmIdMn9ku+CEV9PsQJi6L6CjGfukEcKEHte+gxlqjN+dql0AaU
-vDNfxMMiF/4EiLzpy3IC5ZRoserRGQAEd9ssp5f6wZ7aP1jBAkEA4qt2CEG7nTCo
-HSIt4etzgdgiFEB/G5dcu/5OGpRn/ZitvXj2B4Nspb4ZKLnRYNl/1FwS1rUuLJhx
-oXTGa0iBEwJBAMWrJ2AhWa59byDDwu6FHkbcES5onijV/Lv5kKme+KkLi7RP02Rn
-5/wXic62Y6vaM4ZSw8c/ERd0kC6EBWWScJECQQC2zb01T331eaY7SLNkPjU7hImH
-d7SLFflOC/wFZ6auWRHVetZAnPdke/liZOm9h+uV4mO3EQuaH5+UrM7Q+vpNAkBx
-GV7sN+jSV97PxnKweuY58Qy7mwxznQyAmWjWRKlOP9btkocHehRYPzeQWPdqiuzU
-PGLcjA9BdmZQ1yUnWsShAkEAuzLRM+3C4EjUYziLe+nLS+KfS2JQvmA+cONkdQHJ
-fd3iCk5xvpX9XnF4TiWspLryW+Vziq5Zu/4cmXeBRHorJA==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 -----END RSA PRIVATE KEY-----
diff --git a/tests/suites/helpers.function b/tests/suites/helpers.function
index 10dd04d..d3d613f 100644
--- a/tests/suites/helpers.function
+++ b/tests/suites/helpers.function
@@ -187,6 +187,21 @@
     }                                                                   \
     while( 0 )
 
+/**
+ * \brief   This macro tests the expression passed to it and skips the
+ *          running test if it doesn't evaluate to 'true'.
+ *
+ * \param   TEST    The test expression to be tested.
+ */
+#define TEST_ASSUME( TEST )                         \
+    do {                                            \
+        if( ! (TEST) )                              \
+        {                                           \
+            test_skip( #TEST, __LINE__, __FILE__ ); \
+            goto exit;                              \
+        }                                           \
+    } while( 0 )
+
 #if defined(MBEDTLS_CHECK_PARAMS) && !defined(MBEDTLS_PARAM_FAILED_ALT)
 /**
  * \brief   This macro tests the statement passed to it as a test step or
@@ -372,10 +387,17 @@
 /*----------------------------------------------------------------------------*/
 /* Global variables */
 
+typedef enum
+{
+    TEST_RESULT_SUCCESS = 0,
+    TEST_RESULT_FAILED,
+    TEST_RESULT_SKIPPED
+} test_result_t;
+
 static struct
 {
     paramfail_test_state_t paramfail_test_state;
-    int failed;
+    test_result_t result;
     const char *test;
     const char *filename;
     int line_no;
@@ -411,7 +433,15 @@
 
 void test_fail( const char *test, int line_no, const char* filename )
 {
-    test_info.failed = 1;
+    test_info.result = TEST_RESULT_FAILED;
+    test_info.test = test;
+    test_info.line_no = line_no;
+    test_info.filename = filename;
+}
+
+void test_skip( const char *test, int line_no, const char* filename )
+{
+    test_info.result = TEST_RESULT_SKIPPED;
     test_info.test = test;
     test_info.line_no = line_no;
     test_info.filename = filename;
@@ -450,7 +480,7 @@
         /* Record the location of the failure, but not as a failure yet, in case
          * it was part of the test */
         test_fail( failure_condition, line, file );
-        test_info.failed = 0;
+        test_info.result = TEST_RESULT_SUCCESS;
 
         longjmp( param_fail_jmp, 1 );
     }
diff --git a/tests/suites/host_test.function b/tests/suites/host_test.function
index fe6a2bc..0f98d23 100644
--- a/tests/suites/host_test.function
+++ b/tests/suites/host_test.function
@@ -498,7 +498,8 @@
 
             if( ( ret = get_line( file, buf, sizeof(buf) ) ) != 0 )
                 break;
-            mbedtls_fprintf( stdout, "%s%.66s", test_info.failed ? "\n" : "", buf );
+            mbedtls_fprintf( stdout, "%s%.66s",
+                    test_info.result == TEST_RESULT_FAILED ? "\n" : "", buf );
             mbedtls_fprintf( stdout, " " );
             for( i = strlen( buf ) + 1; i < 67; i++ )
                 mbedtls_fprintf( stdout, "." );
@@ -545,7 +546,7 @@
             // If there are no unmet dependencies execute the test
             if( unmet_dep_count == 0 )
             {
-                test_info.failed = 0;
+                test_info.result = TEST_RESULT_SUCCESS;
                 test_info.paramfail_test_state = PARAMFAIL_TESTSTATE_IDLE;
 
 #if defined(__unix__) || (defined(__APPLE__) && defined(__MACH__))
@@ -610,10 +611,15 @@
             }
             else if( ret == DISPATCH_TEST_SUCCESS )
             {
-                if( test_info.failed == 0 )
+                if( test_info.result == TEST_RESULT_SUCCESS )
                 {
                     mbedtls_fprintf( stdout, "PASS\n" );
                 }
+                else if( test_info.result == TEST_RESULT_SKIPPED )
+                {
+                    mbedtls_fprintf( stdout, "----\n" );
+                    total_skipped++;
+                }
                 else
                 {
                     total_errors++;
diff --git a/tests/suites/main_test.function b/tests/suites/main_test.function
index 1574556..5d15f2b 100644
--- a/tests/suites/main_test.function
+++ b/tests/suites/main_test.function
@@ -159,7 +159,7 @@
     else
     {
         /* Unexpected parameter validation error */
-        test_info.failed = 1;
+        test_info.result = TEST_RESULT_FAILED;
     }
 
     memset( param_fail_jmp, 0, sizeof(jmp_buf) );