diff --git a/tests/imageconverter.cpp b/tests/imageconverter.cpp
index d66e290..5240ed1 100644
--- a/tests/imageconverter.cpp
+++ b/tests/imageconverter.cpp
@@ -38,6 +38,9 @@ int main(int argc, char **argv)
     QCommandLineOption listformats(QStringList() << QStringLiteral("l") << QStringLiteral("list"), QStringLiteral("List supported image formats"));
     parser.addOption(listformats);
 
+    QCommandLineOption listmimes(QStringList() << QStringLiteral("m") << QStringLiteral("listmime"), QStringLiteral("List supported image mime formats"));
+    parser.addOption(listmimes);
+
     parser.process(app);
 
     const QStringList files = parser.positionalArguments();
@@ -57,6 +60,21 @@ int main(int argc, char **argv)
         return 0;
     }
 
+    if (parser.isSet(listmimes)) {
+        QTextStream out(stdout);
+        out << "Input mime formats:\n";
+        const auto lstReaderSupportedMimes = QImageReader::supportedMimeTypes();
+        for (const QByteArray &fmt : lstReaderSupportedMimes) {
+            out << "  " << fmt << '\n';
+        }
+        out << "Output mime formats:\n";
+        const auto lstWriterSupportedMimes = QImageWriter::supportedMimeTypes();
+        for (const QByteArray &fmt : lstWriterSupportedMimes) {
+            out << "  " << fmt << '\n';
+        }
+        return 0;
+    }
+
     if (files.count() != 2) {
         QTextStream(stdout) << "Must provide exactly two files\n";
         parser.showHelp(1);