diff --git a/mp3/metadata/diff/chirp-5-id3.mp3.txt b/mp3/metadata/diff/chirp-5-id3.mp3.txt
new file mode 100644
index 000000000..e4dc5b2b6
--- /dev/null
+++ b/mp3/metadata/diff/chirp-5-id3.mp3.txt
@@ -0,0 +1,30 @@
+       FILE: chirp-5-id3.mp3
+JAVA   TYPE: UNKNOWN
+DOTNET TYPE: MP3
+DOTNET 
+DOTNET [MP3 - 0x0001] ID = MPEG-1
+DOTNET [MP3 - 0x0002] Layer = Layer III
+DOTNET [MP3 - 0x0003] Bitrate = 128
+DOTNET [MP3 - 0x0004] Frequency = 44100
+DOTNET [MP3 - 0x0005] Mode = Mono
+DOTNET [MP3 - 0x0007] Copyright = False
+DOTNET [MP3 - 0x0006] Emphasis Method = none
+DOTNET [MP3 - 0x0008] Frame Size = 417 bytes
+DOTNET 
+DOTNET [File Type - 0x0001] Detected File Type Name = MP3
+DOTNET [File Type - 0x0002] Detected File Type Long Name = MPEG Audio Layer III
+DOTNET [File Type - 0x0003] Detected MIME Type = audio/mpeg
+DOTNET [File Type - 0x0004] Expected File Name Extension = mp3
+DOTNET 
+DOTNET [File - 0x0001] File Name = chirp-5-id3.mp3
+DOTNET [File - 0x0002] File Size = 2125 bytes
+DOTNET [File - 0x0003] File Modified Date = <omitted for regression testing as checkout dependent>
+       
+JAVA   EXCEPTION: File format could not be determined
+DOTNET - MP3
+DOTNET - File Type
+DOTNET - File
+       
+       Generated using metadata-extractor
+       https://drewnoakes.com/code/exif/
+       
diff --git a/mp3/metadata/dotnet/chirp-5-id3.mp3.txt b/mp3/metadata/dotnet/chirp-5-id3.mp3.txt
index 7d32543ac..aca6ffd0e 100644
--- a/mp3/metadata/dotnet/chirp-5-id3.mp3.txt
+++ b/mp3/metadata/dotnet/chirp-5-id3.mp3.txt
@@ -1,7 +1,27 @@
 FILE: chirp-5-id3.mp3
-TYPE: UNKNOWN
+TYPE: MP3
 
-EXCEPTION: File format could not be determined
+[MP3 - 0x0001] ID = MPEG-1
+[MP3 - 0x0002] Layer = Layer III
+[MP3 - 0x0003] Bitrate = 128
+[MP3 - 0x0004] Frequency = 44100
+[MP3 - 0x0005] Mode = Mono
+[MP3 - 0x0007] Copyright = False
+[MP3 - 0x0006] Emphasis Method = none
+[MP3 - 0x0008] Frame Size = 417 bytes
+
+[File Type - 0x0001] Detected File Type Name = MP3
+[File Type - 0x0002] Detected File Type Long Name = MPEG Audio Layer III
+[File Type - 0x0003] Detected MIME Type = audio/mpeg
+[File Type - 0x0004] Expected File Name Extension = mp3
+
+[File - 0x0001] File Name = chirp-5-id3.mp3
+[File - 0x0002] File Size = 2125 bytes
+[File - 0x0003] File Modified Date = <omitted for regression testing as checkout dependent>
+
+- MP3
+- File Type
+- File
 
 Generated using metadata-extractor
 https://drewnoakes.com/code/exif/