diff --git a/.gitignore b/.gitignore
index 57fd0ad..741e785 100644
--- a/.gitignore
+++ b/.gitignore
@@ -51,6 +51,7 @@
 /**/.idea/**/workspace.xml
 /**/.idea/sonarlint*
 /**/.idea_modules/
+/coverage/
 Thumbs.db
 __pycache__
 atlassian-ide-plugin.xml
diff --git a/bin/dcat.dart b/bin/dcat.dart
index 33dcac0..5a74b40 100644
--- a/bin/dcat.dart
+++ b/bin/dcat.dart
@@ -63,9 +63,10 @@ Future<int> main(List<String> arguments) async {
   try {
     argResults = parser.parse(arguments);
   } on FormatException catch (e) {
-    return await printError(
+    exitCode = await printError(
         "${e.message}\nTry '$appName --$helpFlag' for more information.",
         appName: appName);
+    return exitCode;
   }
 
   if (argResults[helpFlag]) {
diff --git a/coverage.sh b/coverage.sh
new file mode 100755
index 0000000..d6ec905
--- /dev/null
+++ b/coverage.sh
@@ -0,0 +1,4 @@
+ dart run test --coverage=coverage
+ dart run coverage:format_coverage --lcov --in=coverage --out=coverage/lcov.info --packages=.packages --report-on=lib,bin
+ genhtml -o coverage coverage/lcov.info 
+ open coverage/index.html 2> /dev/null
diff --git a/test/dcat_test.dart b/test/dcat_test.dart
index 1feef14..1c1abc2 100644
--- a/test/dcat_test.dart
+++ b/test/dcat_test.dart
@@ -1,3 +1,5 @@
+import 'dart:io';
+
 import 'package:dcat/dcat.dart';
 import 'package:test/test.dart';
 
@@ -21,11 +23,22 @@ void main() {
       expect(exitCode, equals(exitSuccess));
     });
 
+    test('Test -a', () async {
+      expect(app.main(['-a']), completion(equals(1)));
+      exitCode = await app.main(['-a']);
+      expect(exitCode, equals(exitFailure));
+    });
+
     test('Test directory', () async {
       exitCode = await app.main(['bin']);
       expect(exitCode, equals(exitFailure));
     });
 
+    test('Test binary', () async {
+      exitCode = await app.main(['test/test.7z']);
+      expect(exitCode, equals(exitFailure));
+    });
+
     test('Test missing file', () async {
       exitCode = await app.main(['foo']);
       expect(exitCode, equals(exitFailure), reason: 'foo not found');
@@ -116,13 +129,13 @@ void main() {
     test('Test cat -A', () async {
       await cat(['test/test.txt'],
           log: log, showNonPrinting: true, showEnds: true, showTabs: true);
-      expect(log.last, equals('^I^A^B^C^DM-^?\$'));
+      expect(log.last, equals('^I^A^B^C^DM-)^?M-^@M-^?\$'));
     });
 
     test('Test cat -t', () async {
       await cat(['test/test.txt'],
           log: log, showNonPrinting: true, showTabs: true);
-      expect(log.last, equals('^I^A^B^C^DM-^?'));
+      expect(log.last, equals('^I^A^B^C^DM-)^?M-^@M-^?'));
     });
 
     test('Test cat-Abs', () async {
@@ -141,5 +154,18 @@ void main() {
       }
       expect(blankLines, 2, reason: 'only 2 blank lines.');
     });
+
+    test('Test cat -v', () async {
+      await cat(['test/test.txt'],
+          log: log, showNonPrinting: true);
+      var hasTab = false;
+      for (final String line in log) {
+        if (line.contains('\t')) {
+          hasTab = true;
+          break;
+        }
+      }
+      expect(hasTab, true, reason: "has real tab");
+    });
   });
 }
diff --git a/test/test.7z b/test/test.7z
new file mode 100644
index 0000000..816a01a
Binary files /dev/null and b/test/test.7z differ
diff --git a/test/test.txt b/test/test.txt
index 5abf6c3..752fec2 100644
--- a/test/test.txt
+++ b/test/test.txt
@@ -7,4 +7,4 @@ Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor i
 
 
 Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.
-	
✓
+	
©€✓
\ No newline at end of file