diff --git a/tests/suites/test_suite_x509write.function b/tests/suites/test_suite_x509write.function
index e15802f..7a359b1 100644
--- a/tests/suites/test_suite_x509write.function
+++ b/tests/suites/test_suite_x509write.function
@@ -57,6 +57,7 @@
         return( MBEDTLS_ERR_X509_CERT_VERIFY_FAILED );
     }
 
+    mbedtls_x509_csr_free( &csr );
     return( 0 );
 }
 #endif /* MBEDTLS_USE_PSA_CRYPTO */