diff --git a/tests/scripts/generate_psa_wrappers.py b/tests/scripts/generate_psa_wrappers.py
index 4f567bcfe1..0aaa7104e4 100755
--- a/tests/scripts/generate_psa_wrappers.py
+++ b/tests/scripts/generate_psa_wrappers.py
@@ -171,6 +171,8 @@ class PSAWrapperGenerator(c_wrapper_generator.Base):
                              'psa_hash_verify',
                              'psa_hash_compute',
                              'psa_hash_compare'):
+
+        if function_name == 'psa_generate_random':
             return True
         return False
 
diff --git a/tests/src/psa_test_wrappers.c b/tests/src/psa_test_wrappers.c
index 032df8d28b..1efa1bb6a6 100644
--- a/tests/src/psa_test_wrappers.c
+++ b/tests/src/psa_test_wrappers.c
@@ -326,7 +326,13 @@ psa_status_t mbedtls_test_wrap_psa_generate_random(
     uint8_t *arg0_output,
     size_t arg1_output_size)
 {
+#if defined(MBEDTLS_PSA_COPY_CALLER_BUFFERS)
+    MBEDTLS_TEST_MEMORY_POISON(arg0_output, arg1_output_size);
+#endif /* defined(MBEDTLS_PSA_COPY_CALLER_BUFFERS) */
     psa_status_t status = (psa_generate_random)(arg0_output, arg1_output_size);
+#if defined(MBEDTLS_PSA_COPY_CALLER_BUFFERS)
+    MBEDTLS_TEST_MEMORY_UNPOISON(arg0_output, arg1_output_size);
+#endif /* defined(MBEDTLS_PSA_COPY_CALLER_BUFFERS) */
     return status;
 }