diff --git a/scripts/mbedtls_dev/bignum_core.py b/scripts/mbedtls_dev/bignum_core.py
index ff3fd23..563492b 100644
--- a/scripts/mbedtls_dev/bignum_core.py
+++ b/scripts/mbedtls_dev/bignum_core.py
@@ -21,6 +21,7 @@
 from . import test_case
 from . import test_data_generation
 from . import bignum_common
+from .bignum_data import ADD_SUB_DATA
 
 class BignumCoreTarget(test_data_generation.BaseTarget):
     #pylint: disable=abstract-method, too-few-public-methods
@@ -176,6 +177,7 @@
     test_function = "mpi_core_add_and_add_if"
     test_name = "mpi_core_add_and_add_if"
     input_style = "arch_split"
+    input_values = ADD_SUB_DATA
     unique_combinations_only = True
 
     def result(self) -> List[str]:
@@ -196,6 +198,7 @@
     symbol = "-"
     test_function = "mpi_core_sub"
     test_name = "mbedtls_mpi_core_sub"
+    input_values = ADD_SUB_DATA
 
     def result(self) -> List[str]:
         if self.int_a >= self.int_b:
diff --git a/scripts/mbedtls_dev/bignum_data.py b/scripts/mbedtls_dev/bignum_data.py
index 0a48e53..897e319 100644
--- a/scripts/mbedtls_dev/bignum_data.py
+++ b/scripts/mbedtls_dev/bignum_data.py
@@ -106,6 +106,29 @@
         RANDOM_1024_BIT_SEED_4_NO2, # largest (not a prime)
         ]
 
+ADD_SUB_DATA = [
+    "0", "1", "3", "f", "fe", "ff", "100", "ff00",
+    "fffe", "ffff", "10000", # 2^16 - 1, 2^16, 2^16 + 1
+    "fffffffe", "ffffffff", "100000000", # 2^32 - 1, 2^32, 2^32 + 1
+    "1f7f7f7f7f7f7f",
+    "8000000000000000", "fefefefefefefefe",
+    "fffffffffffffffe", "ffffffffffffffff", "10000000000000000", # 2^64 - 1, 2^64, 2^64 + 1
+    "1234567890abcdef0",
+    "fffffffffffffffffffffffe",
+    "ffffffffffffffffffffffff",
+    "1000000000000000000000000",
+    "fffffffffffffffffefefefefefefefe",
+    "fffffffffffffffffffffffffffffffe",
+    "ffffffffffffffffffffffffffffffff",
+    "100000000000000000000000000000000",
+    "1234567890abcdef01234567890abcdef0",
+    "fffffffffffffffffffffffffffffffffffffffffffffffffefefefefefefefe",
+    "fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffe",
+    "ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff",
+    "10000000000000000000000000000000000000000000000000000000000000000",
+    "1234567890abcdef01234567890abcdef01234567890abcdef01234567890abcdef0",
+    ]
+
 # Only odd moduli are present as in the new bignum code only odd moduli are
 # supported for now.
 MODULI_DEFAULT = [