diff --git a/tests/signal_test.cpp b/tests/signal_test.cpp
index a54f14d..fcfcb18 100644
--- a/tests/signal_test.cpp
+++ b/tests/signal_test.cpp
@@ -95,3 +95,9 @@
 TEST(signal, sigfillset_invalid) {
   TestSigSet1(sigfillset);
 }
+
+TEST(signal, raise_invalid) {
+  errno = 0;
+  ASSERT_EQ(-1, raise(-1));
+  ASSERT_EQ(EINVAL, errno);
+}