diff --git a/t/t1508-at-combinations.sh b/t/t1508-at-combinations.sh
index 078e1195df..04724674b9 100755
--- a/t/t1508-at-combinations.sh
+++ b/t/t1508-at-combinations.sh
@@ -35,7 +35,7 @@ test_expect_success 'setup' '
 	git checkout -b upstream-branch &&
 	test_commit upstream-one &&
 	test_commit upstream-two &&
-	git checkout -b @/at-test &&
+	git checkout -b @//at-test &&
 	git checkout -b @@/at-test &&
 	git checkout -b @at-test &&
 	git checkout -b old-branch &&
@@ -64,7 +64,7 @@ check "@{-1}@{u}@{1}" commit master-one
 check "@" commit new-two
 check "@@{u}" ref refs/heads/upstream-branch
 check "@@/at-test" ref refs/heads/@@/at-test
-check "@/at-test" ref refs/heads/@/at-test
+check "@//at-test" ref refs/heads/@/at-test
 check "@at-test" ref refs/heads/@at-test
 nonsense "@{u}@{-1}"
 nonsense "@{0}@{0}"