diff --git a/pkg/serving/test.go b/pkg/serving/test.go
index 88ca7e7e34..7fb4782fed 100644
--- a/pkg/serving/test.go
+++ b/pkg/serving/test.go
@@ -167,8 +167,144 @@ func validateServingExampleInput(help *HelpResponse, input map[string]string) er
 
 func extensionByType(mimeType string) string {
 	switch mimeType {
+	case "audio/aac":
+		return ".aac"
+	case "application/x-abiword":
+		return ".abw"
+	case "application/x-freearc":
+		return ".arc"
+	case "video/x-msvideo":
+		return ".avi"
+	case "application/vnd.amazon.ebook":
+		return ".azw"
+	case "application/octet-stream":
+		return ".bin"
+	case "image/bmp":
+		return ".bmp"
+	case "application/x-bzip":
+		return ".bz"
+	case "application/x-bzip2":
+		return ".bz2"
+	case "application/x-csh":
+		return ".csh"
+	case "text/css":
+		return ".css"
+	case "text/csv":
+		return ".csv"
+	case "application/msword":
+		return ".doc"
+	case "application/vnd.openxmlformats-officedocument.wordprocessingml.document":
+		return ".docx"
+	case "application/vnd.ms-fontobject":
+		return ".eot"
+	case "application/epub+zip":
+		return ".epub"
+	case "application/gzip":
+		return ".gz"
+	case "image/gif":
+		return ".gif"
+	case "text/html":
+		return ".html"
+	case "image/vnd.microsoft.icon":
+		return ".ico"
+	case "text/calendar":
+		return ".ics"
+	case "application/java-archive":
+		return ".jar"
+	case "image/jpeg":
+		return ".jpg"
+	case "text/javascript":
+		return ".js"
+	case "application/json":
+		return ".json"
+	case "application/ld+json":
+		return ".jsonld"
+	case "audio/midi audio/x-midi":
+		return ".midi"
+	case "audio/mpeg":
+		return ".mp3"
+	case "application/x-cdf":
+		return ".cda"
+	case "video/mp4":
+		return ".mp4"
+	case "video/mpeg":
+		return ".mpeg"
+	case "application/vnd.apple.installer+xml":
+		return ".mpkg"
+	case "application/vnd.oasis.opendocument.presentation":
+		return ".odp"
+	case "application/vnd.oasis.opendocument.spreadsheet":
+		return ".ods"
+	case "application/vnd.oasis.opendocument.text":
+		return ".odt"
+	case "audio/ogg":
+		return ".oga"
+	case "video/ogg":
+		return ".ogv"
+	case "application/ogg":
+		return ".ogx"
+	case "audio/opus":
+		return ".opus"
+	case "font/otf":
+		return ".otf"
+	case "image/png":
+		return ".png"
+	case "application/pdf":
+		return ".pdf"
+	case "application/x-httpd-php":
+		return ".php"
+	case "application/vnd.ms-powerpoint":
+		return ".ppt"
+	case "application/vnd.openxmlformats-officedocument.presentationml.presentation":
+		return ".pptx"
+	case "application/vnd.rar":
+		return ".rar"
+	case "application/rtf":
+		return ".rtf"
+	case "application/x-sh":
+		return ".sh"
+	case "image/svg+xml":
+		return ".svg"
+	case "application/x-shockwave-flash":
+		return ".swf"
+	case "application/x-tar":
+		return ".tar"
+	case "image/tiff":
+		return ".tiff"
+	case "video/mp2t":
+		return ".ts"
+	case "font/ttf":
+		return ".ttf"
 	case "text/plain":
 		return ".txt"
+	case "application/vnd.visio":
+		return ".vsd"
+	case "audio/wav":
+		return ".wav"
+	case "audio/webm":
+		return ".weba"
+	case "video/webm":
+		return ".webm"
+	case "image/webp":
+		return ".webp"
+	case "font/woff":
+		return ".woff"
+	case "font/woff2":
+		return ".woff2"
+	case "application/xhtml+xml":
+		return ".xhtml"
+	case "application/vnd.ms-excel":
+		return ".xls"
+	case "application/xml":
+		return ".xml"
+	case "application/zip":
+		return ".zip"
+	case "video/3gpp":
+		return ".3gp"
+	case "video/3gpp2":
+		return ".3gp2"
+	case "application/x-7z-compressed":
+		return ".7z"
 	default:
 		extensions, _ := mime.ExtensionsByType(mimeType)
 		if extensions == nil || len(extensions) == 0 {