diff --git a/t/t3701-add-interactive.sh b/t/t3701-add-interactive.sh
index 058698df6a..64fe56c3d5 100755
--- a/t/t3701-add-interactive.sh
+++ b/t/t3701-add-interactive.sh
@@ -392,6 +392,18 @@ test_expect_success TTY 'diffs can be colorized' '
 	grep "$(printf "\\033")" output
 '
 
+test_expect_success TTY 'diffFilter filters diff' '
+	git reset --hard &&
+
+	echo content >test &&
+	test_config interactive.diffFilter "sed s/^/foo:/" &&
+	printf y | test_terminal git add -p >output 2>&1 &&
+
+	# avoid depending on the exact coloring or content of the prompts,
+	# and just make sure we saw our diff prefixed
+	grep foo:.*content output
+'
+
 test_expect_success 'patch-mode via -i prompts for files' '
 	git reset --hard &&