2 files changed, 5 insertions, 5 deletions
diff --git a/whisper/whisperv5/filter.go b/whisper/whisperv5/filter.go
index 3190334eb..9550a7e38 100644
--- a/whisper/whisperv5/filter.go
+++ b/whisper/whisperv5/filter.go
@@ -220,7 +220,7 @@ func matchSingleTopic(topic TopicType, bt []byte) bool {
 		bt = bt[:TopicLength]
 	}
 
-	if len(bt) < TopicLength {
+	if len(bt) == 0 {
 		return false
 	}
 
diff --git a/whisper/whisperv5/filter_test.go b/whisper/whisperv5/filter_test.go
index 01034a351..c01c22668 100644
--- a/whisper/whisperv5/filter_test.go
+++ b/whisper/whisperv5/filter_test.go
@@ -829,16 +829,16 @@ func TestMatchSingleTopic_WithTail_ReturnTrue(t *testing.T) {
 	}
 }
 
-func TestMatchSingleTopic_NotEquals_ReturnFalse(t *testing.T) {
+func TestMatchSingleTopic_PartialTopic_ReturnTrue(t *testing.T) {
 	bt := []byte("tes")
-	topic := BytesToTopic(bt)
+	topic := BytesToTopic([]byte("test"))
 
-	if matchSingleTopic(topic, bt) {
+	if !matchSingleTopic(topic, bt) {
 		t.FailNow()
 	}
 }
 
-func TestMatchSingleTopic_InsufficientLength_ReturnFalse(t *testing.T) {
+func TestMatchSingleTopic_NotEquals_ReturnFalse(t *testing.T) {
 	bt := []byte("test")
 	topic := BytesToTopic([]byte("not_equal"))