diff --git a/tests/scripts/generate_psa_wrappers.py b/tests/scripts/generate_psa_wrappers.py
index 3cdafed167..912ede1c2f 100755
--- a/tests/scripts/generate_psa_wrappers.py
+++ b/tests/scripts/generate_psa_wrappers.py
@@ -154,6 +154,9 @@ class PSAWrapperGenerator(c_wrapper_generator.Base):
                              'psa_sign_hash',
                              'psa_verify_hash'):
             return True
+        if function_name in ('psa_asymmetric_encrypt',
+                             'pas_asymmetric_decrypt'):
+            return True
         return False
 
     def _write_function_call(self, out: typing_util.Writable,
diff --git a/tests/src/psa_test_wrappers.c b/tests/src/psa_test_wrappers.c
index bb1409e10b..c6b084fe4f 100644
--- a/tests/src/psa_test_wrappers.c
+++ b/tests/src/psa_test_wrappers.c
@@ -221,7 +221,17 @@ psa_status_t mbedtls_test_wrap_psa_asymmetric_encrypt(
     size_t arg7_output_size,
     size_t *arg8_output_length)
 {
+#if defined(MBEDTLS_PSA_COPY_CALLER_BUFFERS)
+    MBEDTLS_TEST_MEMORY_POISON(arg2_input, arg3_input_length);
+    MBEDTLS_TEST_MEMORY_POISON(arg4_salt, arg5_salt_length);
+    MBEDTLS_TEST_MEMORY_POISON(arg6_output, arg7_output_size);
+#endif /* defined(MBEDTLS_PSA_COPY_CALLER_BUFFERS) */
     psa_status_t status = (psa_asymmetric_encrypt)(arg0_key, arg1_alg, arg2_input, arg3_input_length, arg4_salt, arg5_salt_length, arg6_output, arg7_output_size, arg8_output_length);
+#if defined(MBEDTLS_PSA_COPY_CALLER_BUFFERS)
+    MBEDTLS_TEST_MEMORY_UNPOISON(arg2_input, arg3_input_length);
+    MBEDTLS_TEST_MEMORY_UNPOISON(arg4_salt, arg5_salt_length);
+    MBEDTLS_TEST_MEMORY_UNPOISON(arg6_output, arg7_output_size);
+#endif /* defined(MBEDTLS_PSA_COPY_CALLER_BUFFERS) */
     return status;
 }