diff --git a/src/util/parser.test.c b/src/util/parser.test.c
index da0d8dacb..c7ac0bb05 100644
--- a/src/util/parser.test.c
+++ b/src/util/parser.test.c
@@ -2,8 +2,16 @@
 #include "parser.h"
 
 #include <string.h>
+#include <errno.h>
 #include <CuTest.h>
 
+static void test_atoip(CuTest *tc) {
+    CuAssertIntEquals(tc, 0, atoip("ALLES"));
+    CuAssertIntEquals(tc, 0, errno);
+    CuAssertIntEquals(tc, 42, atoip("42"));
+    CuAssertIntEquals(tc, 0, atoip("-1"));
+}
+
 static void test_parse_token(CuTest *tc) {
     char lbuf[8];
     const char *tok;
@@ -103,12 +111,6 @@ static void test_getstrtoken(CuTest *tc) {
     CuAssertPtrEquals(tc, NULL, (void *)getstrtoken());
 }
 
-static void test_atoip(CuTest *tc) {
-    CuAssertIntEquals(tc, 42, atoip("42"));
-    CuAssertIntEquals(tc, 0, atoip("-42"));
-    CuAssertIntEquals(tc, 0, atoip("NOPE"));
-}
-
 CuSuite *get_parser_suite(void)
 {
     CuSuite *suite = CuSuiteNew();