diff --git a/tests/qemucapsprobe.c b/tests/qemucapsprobe.c
index 76c18f0dcd..cd117170ab 100644
--- a/tests/qemucapsprobe.c
+++ b/tests/qemucapsprobe.c
@@ -48,7 +48,7 @@ main(int argc, char **argv)
     virQEMUCaps *caps;
     virArch host;
     virArch guest;
-    const char *mock = VIR_TEST_MOCK("qemucapsprobe");
+    g_autofree char *mock = g_strdup_printf("%s/%s", abs_builddir, VIR_TEST_MOCK("qemucapsprobe"));
 
     if (!virFileIsExecutable(mock)) {
         perror(mock);