diff --git a/sequence_test.go b/sequence_test.go
index 9e8a484..bc313ad 100644
--- a/sequence_test.go
+++ b/sequence_test.go
@@ -13,13 +13,18 @@ func TestSequenceCommentFramesUniqueness(t *testing.T) {
 	defer putSequence(s)
 
 	s.AddFrame(CommentFrame{Language: "A", Description: "A"})
-	testSequenceA(t, s)
+	testSequenceCount(t, s, 1)
+	testFrameUniqueIdentifier(t, s.Frames()[0], "AA")
 
 	s.AddFrame(CommentFrame{Language: "B", Description: "B"})
-	testSequenceAB(t, s)
+	testSequenceCount(t, s, 2)
+	testFrameUniqueIdentifier(t, s.Frames()[0], "AA")
+	testFrameUniqueIdentifier(t, s.Frames()[1], "BB")
 
 	s.AddFrame(CommentFrame{Language: "B", Description: "B"})
-	testSequenceAB(t, s)
+	testSequenceCount(t, s, 2)
+	testFrameUniqueIdentifier(t, s.Frames()[0], "AA")
+	testFrameUniqueIdentifier(t, s.Frames()[1], "BB")
 }
 
 func TestSequencePictureFramesUniqueness(t *testing.T) {
@@ -28,14 +33,27 @@ func TestSequencePictureFramesUniqueness(t *testing.T) {
 	s := getSequence()
 	defer putSequence(s)
 
-	s.AddFrame(PictureFrame{Description: "A"})
-	testSequenceA(t, s)
-
-	s.AddFrame(PictureFrame{Description: "B"})
-	testSequenceAB(t, s)
+	s.AddFrame(PictureFrame{Description: "A", PictureType: 0x00})
+	testSequenceCount(t, s, 1)
+	testFrameUniqueIdentifier(t, s.Frames()[0], "00A")
 
-	s.AddFrame(PictureFrame{Description: "B"})
-	testSequenceAB(t, s)
+	// Test against https://github.com/bogem/id3v2/issues/65 regression.
+	s.AddFrame(PictureFrame{Description: "A", PictureType: 0x01})
+	testSequenceCount(t, s, 2)
+	testFrameUniqueIdentifier(t, s.Frames()[0], "00A")
+	testFrameUniqueIdentifier(t, s.Frames()[1], "01A")
+
+	s.AddFrame(PictureFrame{Description: "B", PictureType: 0x00})
+	testSequenceCount(t, s, 3)
+	testFrameUniqueIdentifier(t, s.Frames()[0], "00A")
+	testFrameUniqueIdentifier(t, s.Frames()[1], "01A")
+	testFrameUniqueIdentifier(t, s.Frames()[2], "00B")
+
+	s.AddFrame(PictureFrame{Description: "B", PictureType: 0x00})
+	testSequenceCount(t, s, 3)
+	testFrameUniqueIdentifier(t, s.Frames()[0], "00A")
+	testFrameUniqueIdentifier(t, s.Frames()[1], "01A")
+	testFrameUniqueIdentifier(t, s.Frames()[2], "00B")
 }
 
 func TestSequenceUSLFsUniqueness(t *testing.T) {
@@ -45,13 +63,18 @@ func TestSequenceUSLFsUniqueness(t *testing.T) {
 	defer putSequence(s)
 
 	s.AddFrame(UnsynchronisedLyricsFrame{Language: "A", ContentDescriptor: "A"})
-	testSequenceA(t, s)
+	testSequenceCount(t, s, 1)
+	testFrameUniqueIdentifier(t, s.Frames()[0], "AA")
 
 	s.AddFrame(UnsynchronisedLyricsFrame{Language: "B", ContentDescriptor: "B"})
-	testSequenceAB(t, s)
+	testSequenceCount(t, s, 2)
+	testFrameUniqueIdentifier(t, s.Frames()[0], "AA")
+	testFrameUniqueIdentifier(t, s.Frames()[1], "BB")
 
 	s.AddFrame(UnsynchronisedLyricsFrame{Language: "B", ContentDescriptor: "B"})
-	testSequenceAB(t, s)
+	testSequenceCount(t, s, 2)
+	testFrameUniqueIdentifier(t, s.Frames()[0], "AA")
+	testFrameUniqueIdentifier(t, s.Frames()[1], "BB")
 }
 
 func TestSequenceUDTFsUniqueness(t *testing.T) {
@@ -96,7 +119,7 @@ func testSequenceCount(t *testing.T, s *sequence, expected int) {
 }
 
 func testFrameUniqueIdentifier(t *testing.T, f Framer, expected string) {
-	got := f.UniqueIdentifier()[:1]
+	got := f.UniqueIdentifier()
 	if got != expected {
 		t.Errorf("Expected frame with unique identifier %v, got %v", expected, got)
 	}