diff --git a/testdata/test3.heic b/testdata/test3.heic
new file mode 100644
index 0000000..bbe7b48
Binary files /dev/null and b/testdata/test3.heic differ
diff --git a/type_test.go b/type_test.go
index f3ee219..4d0ab21 100644
--- a/type_test.go
+++ b/type_test.go
@@ -21,6 +21,7 @@ func TestDeterminateImageType(t *testing.T) {
 		{"test.jp2", MAGICK},
 		{"test.heic", HEIF},
 		{"test2.heic", HEIF},
+		{"test3.heic", HEIF},
 	}
 
 	for _, file := range files {