diff --git a/contrib/pg_upgrade/test.sh b/contrib/pg_upgrade/test.sh
index eac50464e1b..4b4998ef1d9 100644
--- a/contrib/pg_upgrade/test.sh
+++ b/contrib/pg_upgrade/test.sh
@@ -32,7 +32,7 @@ standard_initdb() {
 testhost=`uname -s`
 
 case $testhost in
-	MINGW*)
+	MINGW*|MSYS*)
 		LISTEN_ADDRESSES="localhost"
 		PGHOST=localhost
 		;;