diff --git a/.eslintrc b/.eslintrc
index db6f0597..6a6eed21 100644
--- a/.eslintrc
+++ b/.eslintrc
@@ -8,6 +8,7 @@
         "Promise": false,
     },
     "rules": {
+        "comma-dangle": ["error", "never"],
         "indent": ["error", 4],
         "key-spacing": "error",
         "quotes": ["error", "single", {
diff --git a/example/array.js b/example/array.js
index b8ac2abf..8b998041 100644
--- a/example/array.js
+++ b/example/array.js
@@ -22,7 +22,7 @@ test('array', function (t) {
         [ 3, 4 ],
         [ 1, 2, [ 3, 4 ] ],
         [ 5, 6 ],
-        [ [ 1, 2, [ 3, 4 ] ], [ 5, 6 ] ],
+        [ [ 1, 2, [ 3, 4 ] ], [ 5, 6 ] ]
     ];
 
     Function(['fn','g'], output)(
diff --git a/example/fail.js b/example/fail.js
index fbd95687..28c6ac71 100644
--- a/example/fail.js
+++ b/example/fail.js
@@ -22,7 +22,7 @@ test('array', function (t) {
         [ 3, 4 ],
         [ 1, 2, [ 3, 4 ] ],
         [ 5, 6 ],
-        [ [ 1, 2, [ 3, 4 ] ], [ 5, 6 ] ],
+        [ [ 1, 2, [ 3, 4 ] ], [ 5, 6 ] ]
     ];
 
     Function(['fn','g'], output)(
diff --git a/example/nested.js b/example/nested.js
index a465bd42..0e4e1cbd 100644
--- a/example/nested.js
+++ b/example/nested.js
@@ -31,7 +31,7 @@ test('nested array test', function (t) {
         [3, 4],
         [1, 2, [3, 4]],
         [5, 6],
-        [[1, 2, [3, 4]], [5, 6]],
+        [[1, 2, [3, 4]], [5, 6]]
     ];
 
     Function(['fn', 'g'], output)(
diff --git a/example/nested_fail.js b/example/nested_fail.js
index f2c12525..8013a48d 100644
--- a/example/nested_fail.js
+++ b/example/nested_fail.js
@@ -31,7 +31,7 @@ test('nested array test', function (t) {
         [ 3, 4 ],
         [ 1, 2, [ 3, 4 ] ],
         [ 5, 6 ],
-        [ [ 1, 2, [ 3, 4 ] ], [ 5, 6 ] ],
+        [ [ 1, 2, [ 3, 4 ] ], [ 5, 6 ] ]
     ];
 
     Function(['fn','g'], output)(
diff --git a/example/not_enough_fail.js b/example/not_enough_fail.js
index ce7961f5..ecd2dce1 100644
--- a/example/not_enough_fail.js
+++ b/example/not_enough_fail.js
@@ -22,7 +22,7 @@ test('array', function (t) {
         [3, 4],
         [1, 2, [3, 4]],
         [5, 6],
-        [[1, 2, [3, 4]], [5, 6]],
+        [[1, 2, [3, 4]], [5, 6]]
     ];
 
     Function(['fn', 'g'], output)(
diff --git a/example/too_many_fail.js b/example/too_many_fail.js
index 649401b5..e5780be0 100644
--- a/example/too_many_fail.js
+++ b/example/too_many_fail.js
@@ -22,7 +22,7 @@ test('array', function (t) {
         [ 3, 4 ],
         [ 1, 2, [ 3, 4 ] ],
         [ 5, 6 ],
-        [ [ 1, 2, [ 3, 4 ] ], [ 5, 6 ] ],
+        [ [ 1, 2, [ 3, 4 ] ], [ 5, 6 ] ]
     ];
 
     Function(['fn','g'], output)(
diff --git a/test/array.js b/test/array.js
index d150b18e..7a27038a 100644
--- a/test/array.js
+++ b/test/array.js
@@ -47,7 +47,7 @@ tap.test('array test', function (tt) {
             [ 3, 4 ],
             [ 1, 2, [ 3, 4 ] ],
             [ 5, 6 ],
-            [ [ 1, 2, [ 3, 4 ] ], [ 5, 6 ] ],
+            [ [ 1, 2, [ 3, 4 ] ], [ 5, 6 ] ]
         ];
 
         Function(['fn','g'], output)(
diff --git a/test/async-await.js b/test/async-await.js
index c7a996d5..ef88ff01 100644
--- a/test/async-await.js
+++ b/test/async-await.js
@@ -233,7 +233,7 @@ tap.test('async-error', function (t) {
             '# pass  1',
             '# fail  1',
             '',
-            '',
+            ''
         ]);
         t.same(r.exitCode, 1);
 
@@ -279,7 +279,7 @@ tap.test('async-bug', function (t) {
             '# pass  2',
             '# fail  1',
             '',
-            '',
+            ''
         ]);
         t.same(r.exitCode, 1);
 
diff --git a/test/comment.js b/test/comment.js
index 6161b69d..378db5a8 100644
--- a/test/comment.js
+++ b/test/comment.js
@@ -166,11 +166,11 @@ tap.test('multiline string', function (assert) {
     test('multiline strings', function (t) {
         t.comment([
             'a',
-            'b',
+            'b'
         ].join('\n'));
         t.comment([
             'c',
-            'd',
+            'd'
         ].join('\r\n'));
         t.end();
     });
diff --git a/test/error.js b/test/error.js
index 7340e868..6b9025b3 100644
--- a/test/error.js
+++ b/test/error.js
@@ -28,7 +28,7 @@ tap.test('failures', function (tt) {
             '# tests 1',
             '# pass  0',
             '# fail  1',
-            '',
+            ''
         ]);
     }));
 
diff --git a/test/exit/fail.js b/test/exit/fail.js
index 6e8eb4f2..a976d4ce 100644
--- a/test/exit/fail.js
+++ b/test/exit/fail.js
@@ -22,7 +22,7 @@ test('array', function (t) {
         [ 3, 4 ],
         [ 1, 2, [ 3, 4 ] ],
         [ 5, 6 ],
-        [ [ 1, 2, [ 3, 4 ] ], [ 5, 6 ] ],
+        [ [ 1, 2, [ 3, 4 ] ], [ 5, 6 ] ]
     ];
 
     Function(['fn','g'], output)(
diff --git a/test/exit/ok.js b/test/exit/ok.js
index 31bf6a4b..084692f5 100644
--- a/test/exit/ok.js
+++ b/test/exit/ok.js
@@ -23,7 +23,7 @@ test('array', function (t) {
         [ 3, 4 ],
         [ 1, 2, [ 3, 4 ] ],
         [ 5, 6 ],
-        [ [ 1, 2, [ 3, 4 ] ], [ 5, 6 ] ],
+        [ [ 1, 2, [ 3, 4 ] ], [ 5, 6 ] ]
     ];
 
     Function(['fn','g'], output)(
diff --git a/test/exit/too_few.js b/test/exit/too_few.js
index 9ba2ee32..d92fe5c1 100644
--- a/test/exit/too_few.js
+++ b/test/exit/too_few.js
@@ -22,7 +22,7 @@ test('array', function (t) {
         [ 3, 4 ],
         [ 1, 2, [ 3, 4 ] ],
         [ 5, 6 ],
-        [ [ 1, 2, [ 3, 4 ] ], [ 5, 6 ] ],
+        [ [ 1, 2, [ 3, 4 ] ], [ 5, 6 ] ]
     ];
 
     Function(['fn','g'], output)(
diff --git a/test/fail.js b/test/fail.js
index 1d0a312b..c5dab576 100644
--- a/test/fail.js
+++ b/test/fail.js
@@ -64,7 +64,7 @@ tap.test('array test', function (tt) {
             [ 3, 4 ],
             [ 1, 2, [ 3, 4 ] ],
             [ 5, 6 ],
-            [ [ 1, 2, [ 3, 4 ] ], [ 5, 6 ] ],
+            [ [ 1, 2, [ 3, 4 ] ], [ 5, 6 ] ]
         ];
 
         Function(['fn','g'], output)(
diff --git a/test/nested.js b/test/nested.js
index 98c9398c..d86e94cd 100644
--- a/test/nested.js
+++ b/test/nested.js
@@ -62,7 +62,7 @@ tap.test('array test', function (tt) {
             [ 3, 4 ],
             [ 1, 2, [ 3, 4 ] ],
             [ 5, 6 ],
-            [ [ 1, 2, [ 3, 4 ] ], [ 5, 6 ] ],
+            [ [ 1, 2, [ 3, 4 ] ], [ 5, 6 ] ]
         ];
 
         Function(['fn','g'], output)(
diff --git a/test/no_callback.js b/test/no_callback.js
index 646cbca0..47a478dc 100644
--- a/test/no_callback.js
+++ b/test/no_callback.js
@@ -31,7 +31,7 @@ tap.test('no callback', function (tt) {
             '# tests 1',
             '# pass  0',
             '# fail  1',
-            '',
+            ''
         ]);
     };
 
diff --git a/test/too_many.js b/test/too_many.js
index aee90664..530ceb2a 100644
--- a/test/too_many.js
+++ b/test/too_many.js
@@ -65,7 +65,7 @@ tap.test('array test', function (tt) {
             [ 3, 4 ],
             [ 1, 2, [ 3, 4 ] ],
             [ 5, 6 ],
-            [ [ 1, 2, [ 3, 4 ] ], [ 5, 6 ] ],
+            [ [ 1, 2, [ 3, 4 ] ], [ 5, 6 ] ]
         ];
 
         Function(['fn','g'], output)(