diff --git a/tests/suites/test_suite_lmots.function b/tests/suites/test_suite_lmots.function
index 53ab02ff6e..fd6a89f2c8 100644
--- a/tests/suites/test_suite_lmots.function
+++ b/tests/suites/test_suite_lmots.function
@@ -193,6 +193,7 @@ void lmots_import_export_test (  data_t * pub_key, int expected_import_rc )
 
 exit:
     mbedtls_lmots_public_free( &ctx );
+    mbedtls_free( exported_pub_key );
 }
 /* END_CASE */