diff --git a/src/bin/pg_upgrade/test.sh b/src/bin/pg_upgrade/test.sh
index 9c6deae294..1ba326decd 100644
--- a/src/bin/pg_upgrade/test.sh
+++ b/src/bin/pg_upgrade/test.sh
@@ -232,7 +232,7 @@ pg_upgrade $PG_UPGRADE_OPTS -d "${PGDATA}.old" -D "$PGDATA" -b "$oldbindir" -p "
 # make sure all directories and files have group permissions, on Unix hosts
 # Windows hosts don't support Unix-y permissions.
 case $testhost in
-	MINGW*) ;;
+	MINGW*|CYGWIN*) ;;
 	*)	if [ `find "$PGDATA" -type f ! -perm 640 | wc -l` -ne 0 ]; then
 			echo "files in PGDATA with permission != 640";
 			exit 1;
@@ -240,7 +240,7 @@ case $testhost in
 esac
 
 case $testhost in
-	MINGW*) ;;
+	MINGW*|CYGWIN*) ;;
 	*)	if [ `find "$PGDATA" -type d ! -perm 750 | wc -l` -ne 0 ]; then
 			echo "directories in PGDATA with permission != 750";
 			exit 1;