diff --git a/tests/scripts/all.sh b/tests/scripts/all.sh
index 2da9fe2..22018eb 100755
--- a/tests/scripts/all.sh
+++ b/tests/scripts/all.sh
@@ -3211,8 +3211,8 @@
     make WINDOWS_BUILD=1 clean
 }
 support_build_mingw() {
-    case $(i686-w64-mingw32-gcc -dumpversion) in
-        [0-5]*) false;;
+    case $(i686-w64-mingw32-gcc -dumpversion 2>/dev/null) in
+        [0-5]*|"") false;;
         *) true;;
     esac
 }