diff --git a/ip/resolver/basic_http/service_test.go b/ip/resolver/basic_http/service_test.go
index 250aaf7..5611e8f 100644
--- a/ip/resolver/basic_http/service_test.go
+++ b/ip/resolver/basic_http/service_test.go
@@ -51,3 +51,34 @@ func TestService_Lookup_WithHeaders(t *testing.T) {
 
 	assert.Equal(t, net.IPv4(125, 74, 233, 13), ip)
 }
+
+func TestService_Lookup_HTTPError(t *testing.T) {
+	server := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		w.WriteHeader(404)
+	}))
+	defer server.Close()
+
+	s := Service{
+		Url: server.URL,
+	}
+
+	ip, err := s.Lookup()
+	assert.EqualError(t, err, "HTTP Response: 404 Not Found")
+	assert.Nil(t, ip)
+}
+
+func TestService_Lookup_ParseError(t *testing.T) {
+	server := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		_, err := w.Write([]byte("random_string"))
+		assert.NoError(t, err)
+	}))
+	defer server.Close()
+
+	s := Service{
+		Url: server.URL,
+	}
+
+	ip, err := s.Lookup()
+	assert.EqualError(t, err, "Failed to parse ip: random_string")
+	assert.Nil(t, ip)
+}