diff --git a/src/test/test_util.c b/src/test/test_util.c
index 162f6fbc0a..475fbed1e5 100644
--- a/src/test/test_util.c
+++ b/src/test/test_util.c
@@ -2578,6 +2578,7 @@ test_util_decompress_dos_impl(compress_method_t method)
 
  done:
   teardown_capture_of_logs();
+  tor_free(input);
   tor_free(result);
   tor_free(result2);
 }