diff --git a/.eslintrc b/.eslintrc
index 9d426858..cd66dba1 100644
--- a/.eslintrc
+++ b/.eslintrc
@@ -23,6 +23,7 @@
             "anonymous": "always",
             "named": "never",
         }],
+        "no-extra-semi": "error",
         "no-undef": "error",
         "no-useless-escape": "error",
         "operator-linebreak": ["error", "before"],
diff --git a/index.js b/index.js
index 44dd0f9c..be759e87 100644
--- a/index.js
+++ b/index.js
@@ -110,7 +110,7 @@ function createExitHarness(conf, wait) {
             es.on('error', function (err) { harness._exitCode = 1; });
         }
         stream.on('end', function () { ended = true; });
-    };
+    }
 }
 
 module.exports.createHarness = createHarness;
diff --git a/lib/results.js b/lib/results.js
index bd5cf2d7..35b6569d 100644
--- a/lib/results.js
+++ b/lib/results.js
@@ -158,7 +158,7 @@ function encodeResult(res, count) {
         output += ' # SKIP' + ((typeof res.skip === 'string') ? ' ' + coalesceWhiteSpaces(res.skip) : '');
     } else if (res.todo) {
         output += ' # TODO' + ((typeof res.todo === 'string') ? ' ' + coalesceWhiteSpaces(res.todo) : '');
-    };
+    }
 
     output += '\n';
     if (res.ok) return output;
diff --git a/test/double_end.js b/test/double_end.js
index 23d6dc7c..af630cae 100644
--- a/test/double_end.js
+++ b/test/double_end.js
@@ -20,7 +20,7 @@ test(function (tt) {
         // This code is unfortunately by necessity highly coupled to node
         // versions, and may require tweaking with future versions of the timers
         // library.
-        function doEnd() { throw new Error(); };
+        function doEnd() { throw new Error(); }
         var to = setTimeout(doEnd, 5000);
         clearTimeout(to);
         to._onTimeout = doEnd;