diff --git a/tests/scripts/generate_psa_wrappers.py b/tests/scripts/generate_psa_wrappers.py
index cdc798d..a6c340c 100755
--- a/tests/scripts/generate_psa_wrappers.py
+++ b/tests/scripts/generate_psa_wrappers.py
@@ -163,6 +163,8 @@
                              '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 5f0a3dd..fa9a8d6 100644
--- a/tests/src/psa_test_wrappers.c
+++ b/tests/src/psa_test_wrappers.c
@@ -542,7 +542,13 @@
     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;
 }