diff --git a/t/t5520-pull.sh b/t/t5520-pull.sh
index 35304b41e9..cb1a4c581f 100755
--- a/t/t5520-pull.sh
+++ b/t/t5520-pull.sh
@@ -96,8 +96,7 @@ test_expect_success '--rebase' '
 '
 test_expect_success 'pull.rebase' '
 	git reset --hard before-rebase &&
-	git config --bool pull.rebase true &&
-	test_when_finished "git config --unset pull.rebase" &&
+	test_config pull.rebase true &&
 	git pull . copy &&
 	test $(git rev-parse HEAD^) = $(git rev-parse copy) &&
 	test new = $(git show HEAD:file2)
@@ -105,8 +104,7 @@ test_expect_success 'pull.rebase' '
 
 test_expect_success 'branch.to-rebase.rebase' '
 	git reset --hard before-rebase &&
-	git config --bool branch.to-rebase.rebase true &&
-	test_when_finished "git config --unset branch.to-rebase.rebase" &&
+	test_config branch.to-rebase.rebase true &&
 	git pull . copy &&
 	test $(git rev-parse HEAD^) = $(git rev-parse copy) &&
 	test new = $(git show HEAD:file2)
@@ -114,10 +112,8 @@ test_expect_success 'branch.to-rebase.rebase' '
 
 test_expect_success 'branch.to-rebase.rebase should override pull.rebase' '
 	git reset --hard before-rebase &&
-	git config --bool pull.rebase true &&
-	test_when_finished "git config --unset pull.rebase" &&
-	git config --bool branch.to-rebase.rebase false &&
-	test_when_finished "git config --unset branch.to-rebase.rebase" &&
+	test_config pull.rebase true &&
+	test_config branch.to-rebase.rebase false &&
 	git pull . copy &&
 	test $(git rev-parse HEAD^) != $(git rev-parse copy) &&
 	test new = $(git show HEAD:file2)