diff --git a/usr.bin/diff/tests/diff_test.sh b/usr.bin/diff/tests/diff_test.sh
index fa76c7ada3e..5bcc57e0815 100755
--- a/usr.bin/diff/tests/diff_test.sh
+++ b/usr.bin/diff/tests/diff_test.sh
@@ -283,6 +283,10 @@ binary_body()
 
 functionname_body()
 {
+	if [ "$(atf_config_get ci false)" = "true" ]; then
+		atf_skip "https://bugs.freebsd.org/262086"
+	fi
+
 	atf_check -o file:$(atf_get_srcdir)/functionname_c.out -s exit:1 \
 		diff -u -p -L functionname.in -L functionname_c.in \
 		"$(atf_get_srcdir)/functionname.in" "$(atf_get_srcdir)/functionname_c.in"