diff --git a/tests/src/psa_test_wrappers.c b/tests/src/psa_test_wrappers.c
index c074e8d..5382d03 100644
--- a/tests/src/psa_test_wrappers.c
+++ b/tests/src/psa_test_wrappers.c
@@ -340,7 +340,15 @@
     const uint8_t *arg3_hash,
     size_t arg4_hash_length)
 {
+#if defined(MBEDTLS_PSA_COPY_CALLER_BUFFERS)
+    MBEDTLS_TEST_MEMORY_POISON(arg1_input, arg2_input_length);
+    MBEDTLS_TEST_MEMORY_POISON(arg3_hash, arg4_hash_length);
+#endif /* defined(MBEDTLS_PSA_COPY_CALLER_BUFFERS) */
     psa_status_t status = (psa_hash_compare)(arg0_alg, arg1_input, arg2_input_length, arg3_hash, arg4_hash_length);
+#if defined(MBEDTLS_PSA_COPY_CALLER_BUFFERS)
+    MBEDTLS_TEST_MEMORY_UNPOISON(arg1_input, arg2_input_length);
+    MBEDTLS_TEST_MEMORY_UNPOISON(arg3_hash, arg4_hash_length);
+#endif /* defined(MBEDTLS_PSA_COPY_CALLER_BUFFERS) */
     return status;
 }
 
@@ -353,7 +361,15 @@
     size_t arg4_hash_size,
     size_t *arg5_hash_length)
 {
+#if defined(MBEDTLS_PSA_COPY_CALLER_BUFFERS)
+    MBEDTLS_TEST_MEMORY_POISON(arg1_input, arg2_input_length);
+    MBEDTLS_TEST_MEMORY_POISON(arg3_hash, arg4_hash_size);
+#endif /* defined(MBEDTLS_PSA_COPY_CALLER_BUFFERS) */
     psa_status_t status = (psa_hash_compute)(arg0_alg, arg1_input, arg2_input_length, arg3_hash, arg4_hash_size, arg5_hash_length);
+#if defined(MBEDTLS_PSA_COPY_CALLER_BUFFERS)
+    MBEDTLS_TEST_MEMORY_UNPOISON(arg1_input, arg2_input_length);
+    MBEDTLS_TEST_MEMORY_UNPOISON(arg3_hash, arg4_hash_size);
+#endif /* defined(MBEDTLS_PSA_COPY_CALLER_BUFFERS) */
     return status;
 }
 
@@ -364,7 +380,13 @@
     size_t arg2_hash_size,
     size_t *arg3_hash_length)
 {
+#if defined(MBEDTLS_PSA_COPY_CALLER_BUFFERS)
+    MBEDTLS_TEST_MEMORY_POISON(arg1_hash, arg2_hash_size);
+#endif /* defined(MBEDTLS_PSA_COPY_CALLER_BUFFERS) */
     psa_status_t status = (psa_hash_finish)(arg0_operation, arg1_hash, arg2_hash_size, arg3_hash_length);
+#if defined(MBEDTLS_PSA_COPY_CALLER_BUFFERS)
+    MBEDTLS_TEST_MEMORY_UNPOISON(arg1_hash, arg2_hash_size);
+#endif /* defined(MBEDTLS_PSA_COPY_CALLER_BUFFERS) */
     return status;
 }
 
@@ -383,7 +405,13 @@
     const uint8_t *arg1_input,
     size_t arg2_input_length)
 {
+#if defined(MBEDTLS_PSA_COPY_CALLER_BUFFERS)
+    MBEDTLS_TEST_MEMORY_POISON(arg1_input, arg2_input_length);
+#endif /* defined(MBEDTLS_PSA_COPY_CALLER_BUFFERS) */
     psa_status_t status = (psa_hash_update)(arg0_operation, arg1_input, arg2_input_length);
+#if defined(MBEDTLS_PSA_COPY_CALLER_BUFFERS)
+    MBEDTLS_TEST_MEMORY_UNPOISON(arg1_input, arg2_input_length);
+#endif /* defined(MBEDTLS_PSA_COPY_CALLER_BUFFERS) */
     return status;
 }
 
@@ -393,7 +421,13 @@
     const uint8_t *arg1_hash,
     size_t arg2_hash_length)
 {
+#if defined(MBEDTLS_PSA_COPY_CALLER_BUFFERS)
+    MBEDTLS_TEST_MEMORY_POISON(arg1_hash, arg2_hash_length);
+#endif /* defined(MBEDTLS_PSA_COPY_CALLER_BUFFERS) */
     psa_status_t status = (psa_hash_verify)(arg0_operation, arg1_hash, arg2_hash_length);
+#if defined(MBEDTLS_PSA_COPY_CALLER_BUFFERS)
+    MBEDTLS_TEST_MEMORY_UNPOISON(arg1_hash, arg2_hash_length);
+#endif /* defined(MBEDTLS_PSA_COPY_CALLER_BUFFERS) */
     return status;
 }