3 files changed, 30 insertions, 0 deletions

diff --git a/tests/Makefile b/tests/Makefile
index 5f70069..a93e0e9 100644
--- a/tests/Makefile
+++ b/tests/Makefile
@@ -10,6 +10,8 @@ RUNTIME_TARGETS= \
         test_FD_CLR_negative         \
         test_FD_SET_SETSIZE          \
         test_FD_SET_negative         \
+        test_FD_ISSET_SETSIZE        \
+        test_FD_ISSET_negative       \
         test_bcopy_dynamic_read      \
         test_bcopy_dynamic_write     \
         test_bcopy_static_read       \
diff --git a/tests/test_FD_ISSET_SETSIZE.c b/tests/test_FD_ISSET_SETSIZE.c
new file mode 100644
index 0000000..0362aaa
--- /dev/null
+++ b/tests/test_FD_ISSET_SETSIZE.c
@@ -0,0 +1,14 @@
+#include "common.h"
+
+#include <sys/select.h>
+
+int main(int argc, char** argv) {
+  fd_set rfds;
+
+  CHK_FAIL_START
+  FD_ISSET(FD_SETSIZE, &rfds);
+  CHK_FAIL_END
+
+  puts((const char*)&rfds);
+  return ret;
+}
diff --git a/tests/test_FD_ISSET_negative.c b/tests/test_FD_ISSET_negative.c
new file mode 100644
index 0000000..f0ff89a
--- /dev/null
+++ b/tests/test_FD_ISSET_negative.c
@@ -0,0 +1,14 @@
+#include "common.h"
+
+#include <sys/select.h>
+
+int main(int argc, char** argv) {
+  fd_set rfds;
+
+  CHK_FAIL_START
+  FD_ISSET(-1, &rfds);
+  CHK_FAIL_END
+
+  puts((const char*)&rfds);
+  return ret;
+}