diff --git a/t/check-non-portable-shell.pl b/t/check-non-portable-shell.pl
index 6ee7700eb4..18d944b810 100755
--- a/t/check-non-portable-shell.pl
+++ b/t/check-non-portable-shell.pl
@@ -36,7 +36,7 @@ while (<>) {
 
 	$_ = $line;
 	/\bcp\s+-a/ and err 'cp -a is not portable';
-	/\bsed\s+-[^efn]\s+/ and err 'sed option not portable (use only -n, -e, -f)';
+	/\bsed\s+-[^Eefn]\s+/ and err 'sed option not portable (use only -E, -n, -e, -f)';
 	/\becho\s+-[neE]/ and err 'echo with option is not portable (use printf)';
 	/^\s*declare\s+/ and err 'arrays/declare not portable';
 	/^\s*[^#]\s*which\s/ and err 'which is not portable (use type)';
diff --git a/t/t6030-bisect-porcelain.sh b/t/t6030-bisect-porcelain.sh
index cdc0270640..1ba9ca219e 100755
--- a/t/t6030-bisect-porcelain.sh
+++ b/t/t6030-bisect-porcelain.sh
@@ -402,7 +402,7 @@ test_expect_success 'git bisect run: negative exit code' "
 	git bisect good $HASH1 &&
 	git bisect bad $HASH4 &&
 	! git bisect run ./fail.sh 2>err &&
-	sed -En 's/.*(bisect.*code) (-?[0-9]+) (from.*)/\1 -1 \3/p' err >actual &&
+	sed -E -n 's/.*(bisect.*code) (-?[0-9]+) (from.*)/\1 -1 \3/p' err >actual &&
 	test_cmp expect actual
 "