diff --git a/t/t3700-add.sh b/t/t3700-add.sh
index 77a782c9ad3ec8cbcdd95cd0dd521b397846c40a..2ac93a346d016c65614f2bf6142049e7bdc39bd1 100755
--- a/t/t3700-add.sh
+++ b/t/t3700-add.sh
@@ -222,11 +222,11 @@ test_expect_success 'git add (add.ignore-errors = false)' '
 	! ( git ls-files foo1 | grep foo1 )
 '
 
-test_expect_success 'git add '\''fo\?bar'\'' ignores foobar' '
+test_expect_success 'git add '\''fo\[ou\]bar'\'' ignores foobar' '
 	git reset --hard &&
-	touch fo\?bar foobar &&
-	git add '\''fo\?bar'\'' &&
-	git ls-files fo\?bar | grep -F fo\?bar &&
+	touch fo\[ou\]bar foobar &&
+	git add '\''fo\[ou\]bar'\'' &&
+	git ls-files fo\[ou\]bar | grep -F fo\[ou\]bar &&
 	! ( git ls-files foobar | grep foobar )
 '