diff --git a/test/exec.c b/test/exec.c
index cfc28e5..ef3606c 100644
--- a/test/exec.c
+++ b/test/exec.c
@@ -61,6 +61,17 @@ TEST execute_multiple(void) {
 	PASS();
 }
 
+TEST not_in(void) {
+	struct libscomm_line x = {0};
+	x.len = 1;
+
+	doexec("test2", LIBSCOMM_NOT_FOUND);
+	doexec("flub", LIBSCOMM_NOT_FOUND);
+	doexec("doexec", LIBSCOMM_NOT_FOUND);
+
+	PASS();
+}
+
 GREATEST_MAIN_DEFS();
 
 int main(int argc, char *argv[]) {
@@ -68,6 +79,7 @@ int main(int argc, char *argv[]) {
 
 	RUN_TEST(execute_one);
 	RUN_TEST(execute_multiple);
+	RUN_TEST(not_in);
 
 	GREATEST_MAIN_END();
 }