1 files changed, 16 insertions, 0 deletions
diff --git a/t/t7810-grep.sh b/t/t7810-grep.sh
index e845218f67..2a31eca5f2 100755
--- a/t/t7810-grep.sh
+++ b/t/t7810-grep.sh
@@ -637,4 +637,20 @@ test_expect_success LIBPCRE 'grep -P -w pattern' '
 	test_cmp expected actual
 '
 
+test_expect_success LIBPCRE 'grep -P -F returns error' '
+	test_expect_code 128 git grep -P -F main
+'
+
+test_expect_success LIBPCRE 'grep -P -E returns error' '
+	test_expect_code 128 git grep -P -E main
+'
+
+test_expect_failure LIBPCRE 'grep -P -G returns error' '
+	test_expect_code 128 git grep -P -G main
+'
+
+test_expect_failure LIBPCRE 'grep -P -E -G returns error' '
+	test_expect_code 128 git grep -P -E -G main
+'
+
 test_done