Add missing cleanup

Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
diff --git a/tests/suites/test_suite_ssl_decrypt.function b/tests/suites/test_suite_ssl_decrypt.function
index 01cee61..8b7082a 100644
--- a/tests/suites/test_suite_ssl_decrypt.function
+++ b/tests/suites/test_suite_ssl_decrypt.function
@@ -239,6 +239,9 @@
     }
 
 exit:
+#if defined(MBEDTLS_USE_PSA_CRYPTO)
+    psa_mac_abort(&operation);
+#endif
     mbedtls_ssl_free(&ssl);
     mbedtls_ssl_transform_free(&t0);
     mbedtls_ssl_transform_free(&t1);