diff --git a/matrix_test.go b/matrix_test.go
index 85dd796..fe96c62 100644
--- a/matrix_test.go
+++ b/matrix_test.go
@@ -744,6 +744,15 @@
 	assert.Equal(tokens[10], ".")
 	assert.Equal(11, len(tokens))
 
+	// IPtest
+	tokens = ttokenize(mat, w, "Meine IP ist 192.178.168.55.")
+	assert.Equal(tokens[0], "Meine")
+	assert.Equal(tokens[1], "IP")
+	assert.Equal(tokens[2], "ist")
+	assert.Equal(tokens[3], "192.178.168.55")
+	assert.Equal(tokens[4], ".")
+	assert.Equal(5, len(tokens))
+
 	/*
 		@Test
 		public void englishTokenizerSeparatesEnglishContractionsAndClitics () {