diff --git a/.eslintrc b/.eslintrc
index 674234d4..40369d2a 100644
--- a/.eslintrc
+++ b/.eslintrc
@@ -3,6 +3,9 @@
     "rules": {
         "indent": ["error", 4],
         "key-spacing": "error",
+        "quotes": ["error", "single", {
+            "avoidEscape": true,
+        }],
         "semi": ["error", "always"],
         "space-before-function-paren": ["error", {
             "anonymous": "always",
diff --git a/test/circular-things.js b/test/circular-things.js
index 98e57a38..dcab2b12 100644
--- a/test/circular-things.js
+++ b/test/circular-things.js
@@ -35,7 +35,7 @@ tap.test('circular test', function (assert) {
         );
     }));
 
-    test("circular", function (t) {
+    test('circular', function (t) {
         t.plan(1);
         var circular = {};
         circular.circular = circular;
diff --git a/test/comment.js b/test/comment.js
index b3f9bcc3..007d457a 100644
--- a/test/comment.js
+++ b/test/comment.js
@@ -130,7 +130,7 @@ tap.test('non-string types', function (assert) {
         t.comment(42);
         t.comment(6.66);
         t.comment({});
-        t.comment({"answer": 42});
+        t.comment({'answer': 42});
         function ConstructorFunction() {}
         t.comment(new ConstructorFunction());
         t.comment(ConstructorFunction);
diff --git a/test/create_multiple_streams.js b/test/create_multiple_streams.js
index 53f43091..8ecac498 100644
--- a/test/create_multiple_streams.js
+++ b/test/create_multiple_streams.js
@@ -23,7 +23,7 @@ tape.test('createMultipleStreams', function (tt) {
     });
 
     th.onFinish(function () {
-        tt.equal(th._results.count, 2, "harness test ran");
+        tt.equal(th._results.count, 2, 'harness test ran');
         tt.equal(th._results.fail,  0, "harness test didn't fail");
     });
 });
diff --git a/test/deep-equal-failure.js b/test/deep-equal-failure.js
index 6bf91d8d..e1f2659e 100644
--- a/test/deep-equal-failure.js
+++ b/test/deep-equal-failure.js
@@ -62,7 +62,7 @@ tap.test('deep equal failure', function (assert) {
         });
     });
 
-    test("deep equal", function (t) {
+    test('deep equal', function (t) {
         t.plan(1);
         t.equal({a: 1}, {b: 2});
     });
@@ -123,7 +123,7 @@ tap.test('deep equal failure, depth 6, with option', function (assert) {
         });
     });
 
-    test("deep equal", {objectPrintDepth: 6}, function (t) {
+    test('deep equal', {objectPrintDepth: 6}, function (t) {
         t.plan(1);
         t.equal({ a: { a1: { a2: { a3: { a4: { a5: 1 } } } } } }, { a: { a1: { a2: { a3: { a4: { a5: 2 } } } } } });
     });
@@ -184,7 +184,7 @@ tap.test('deep equal failure, depth 6, without option', function (assert) {
         });
     });
 
-    test("deep equal", function (t) {
+    test('deep equal', function (t) {
         t.plan(1);
         t.equal({ a: { a1: { a2: { a3: { a4: { a5: 1 } } } } } }, { a: { a1: { a2: { a3: { a4: { a5: 2 } } } } } });
     });
diff --git a/test/end-as-callback.js b/test/end-as-callback.js
index a9786881..a8c70940 100644
--- a/test/end-as-callback.js
+++ b/test/end-as-callback.js
@@ -1,9 +1,9 @@
-var tap = require("tap");
-var forEach = require("for-each");
-var tape = require("../");
+var tap = require('tap');
+var forEach = require('for-each');
+var tape = require('../');
 var concat = require('concat-stream');
 
-tap.test("tape assert.end as callback", function (tt) {
+tap.test('tape assert.end as callback', function (tt) {
     var test = tape.createHarness({ exit: false });
 
     test.createStream().pipe(concat(function (rows) {
@@ -26,27 +26,27 @@ tap.test("tape assert.end as callback", function (tt) {
         tt.end();
     }));
 
-    test("do a task and write", function (assert) {
-        fakeAsyncTask("foo", function (err, value) {
+    test('do a task and write', function (assert) {
+        fakeAsyncTask('foo', function (err, value) {
             assert.ifError(err);
-            assert.equal(value, "taskfoo");
+            assert.equal(value, 'taskfoo');
 
-            fakeAsyncWrite("bar", assert.end);
+            fakeAsyncWrite('bar', assert.end);
         });
     });
 
-    test("do a task and write fail", function (assert) {
-        fakeAsyncTask("bar", function (err, value) {
+    test('do a task and write fail', function (assert) {
+        fakeAsyncTask('bar', function (err, value) {
             assert.ifError(err);
-            assert.equal(value, "taskbar");
+            assert.equal(value, 'taskbar');
 
-            fakeAsyncWriteFail("baz", assert.end);
+            fakeAsyncWriteFail('baz', assert.end);
         });
     });
 });
 
 function fakeAsyncTask(name, cb) {
-    cb(null, "task" + name);
+    cb(null, 'task' + name);
 }
 
 function fakeAsyncWrite(name, cb) {
@@ -54,7 +54,7 @@ function fakeAsyncWrite(name, cb) {
 }
 
 function fakeAsyncWriteFail(name, cb) {
-    cb(new Error("fail"));
+    cb(new Error('fail'));
 }
 
 /**
diff --git a/test/not-deep-equal-failure.js b/test/not-deep-equal-failure.js
index 166f7e02..63fbd614 100644
--- a/test/not-deep-equal-failure.js
+++ b/test/not-deep-equal-failure.js
@@ -62,7 +62,7 @@ tap.test('deep equal failure', function (assert) {
         });
     });
 
-    test("not deep equal", function (t) {
+    test('not deep equal', function (t) {
         t.plan(1);
         t.notDeepEqual({b: 2}, {b: 2});
     });
@@ -123,7 +123,7 @@ tap.test('not deep equal failure, depth 6, with option', function (assert) {
         });
     });
 
-    test("not deep equal", {objectPrintDepth: 6}, function (t) {
+    test('not deep equal', {objectPrintDepth: 6}, function (t) {
         t.plan(1);
         t.notDeepEqual({ a: { a1: { a2: { a3: { a4: { a5: 1 } } } } } }, { a: { a1: { a2: { a3: { a4: { a5: 1 } } } } } });
     });
@@ -184,7 +184,7 @@ tap.test('not deep equal failure, depth 6, without option', function (assert) {
         });
     });
 
-    test("not deep equal", function (t) {
+    test('not deep equal', function (t) {
         t.plan(1);
         t.notDeepEqual({ a: { a1: { a2: { a3: { a4: { a5: 1 } } } } } }, { a: { a1: { a2: { a3: { a4: { a5: 1 } } } } } });
     });
diff --git a/test/not-equal-failure.js b/test/not-equal-failure.js
index 83fc0a4e..28e31a65 100644
--- a/test/not-equal-failure.js
+++ b/test/not-equal-failure.js
@@ -60,7 +60,7 @@ tap.test('not equal failure', function (assert) {
         });
     });
 
-    test("not equal", function (t) {
+    test('not equal', function (t) {
         t.plan(1);
         t.notEqual(2, 2);
     });
diff --git a/test/onFailure.js b/test/onFailure.js
index ec5d9345..666227d7 100644
--- a/test/onFailure.js
+++ b/test/onFailure.js
@@ -1,5 +1,5 @@
-var tap = require("tap");
-var tape = require("../").createHarness();
+var tap = require('tap');
+var tape = require('../').createHarness();
 
 //Because this test passing depends on a failure,
 //we must direct the failing output of the inner test
@@ -7,15 +7,15 @@ var noop = function () {};
 var mockSink = {on: noop, removeListener: noop, emit: noop, end: noop};
 tape.createStream().pipe(mockSink);
 
-tap.test("on failure", { timeout: 1000 }, function (tt) {
+tap.test('on failure', { timeout: 1000 }, function (tt) {
     tt.plan(1);
 
-    tape("dummy test", function (t) {
+    tape('dummy test', function (t) {
         t.fail();
         t.end();
     });
 
     tape.onFailure(function () {
-        tt.pass("tape ended");
+        tt.pass('tape ended');
     });
 });
diff --git a/test/onFinish.js b/test/onFinish.js
index 80ccf051..7881273e 100644
--- a/test/onFinish.js
+++ b/test/onFinish.js
@@ -1,7 +1,7 @@
-var tap = require("tap");
-var tape = require("../");
+var tap = require('tap');
+var tape = require('../');
 
-tap.test("on finish", {timeout: 1000}, function (tt) {
+tap.test('on finish', {timeout: 1000}, function (tt) {
     tt.plan(1);
     tape.onFinish(function () {
         tt.pass('tape ended');
diff --git a/test/only-twice.js b/test/only-twice.js
index 47c97f5f..cca7c758 100644
--- a/test/only-twice.js
+++ b/test/only-twice.js
@@ -4,7 +4,7 @@ var tap = require('tap');
 tap.test('only twice error', function (assert) {
     var test = tape.createHarness({ exit: false });
 
-    test.only("first only", function (t) {
+    test.only('first only', function (t) {
         t.end();
     });
 
diff --git a/test/only.js b/test/only.js
index bcfc9058..41f2f839 100644
--- a/test/only.js
+++ b/test/only.js
@@ -25,21 +25,21 @@ tap.test('tape only test', function (tt) {
 
     test.createStream().pipe(concat(tc));
 
-    test("never run fail", function (t) {
+    test('never run fail', function (t) {
         ran.push(1);
         t.equal(true, false);
         t.end();
     });
 
-    test("never run success", function (t) {
+    test('never run success', function (t) {
         ran.push(2);
         t.equal(true, true);
         t.end();
     });
 
-    test.only("run success", function (t) {
+    test.only('run success', function (t) {
         ran.push(3);
-        t.ok(true, "assert name");
+        t.ok(true, 'assert name');
         t.end();
     });
 });
diff --git a/test/stackTrace.js b/test/stackTrace.js
index e7f8d4b7..54298184 100644
--- a/test/stackTrace.js
+++ b/test/stackTrace.js
@@ -17,7 +17,7 @@ tap.test('preserves stack trace with newlines', function (tt) {
         tt.deepEqual(data, {
             ok: false,
             id: 1,
-            name: "Error: Preserve stack",
+            name: 'Error: Preserve stack',
             diag: {
                 stack: stackTrace,
                 operator: 'error',
@@ -121,7 +121,7 @@ tap.test('preserves stack trace for failed assertions', function (tt) {
         tt.deepEqual(data, {
             ok: false,
             id: 1,
-            name: "true should be false",
+            name: 'true should be false',
             diag: {
                 at: at,
                 stack: stack,
@@ -186,7 +186,7 @@ tap.test('preserves stack trace for failed assertions where actual===falsy', fun
         tt.deepEqual(data, {
             ok: false,
             id: 1,
-            name: "false should be true",
+            name: 'false should be true',
             diag: {
                 at: at,
                 stack: stack,
diff --git a/test/throws.js b/test/throws.js
index a919b4ec..1628d822 100644
--- a/test/throws.js
+++ b/test/throws.js
@@ -39,7 +39,7 @@ tap.test('failures', function (tt) {
             + '    expected: |-\n'
             + '      undefined\n'
             + '    actual: |-\n'
-            + "      { [TypeError: " + getNonFunctionMessage() + "] message: '" + getNonFunctionMessage() + "' }\n"
+            + '      { [TypeError: ' + getNonFunctionMessage() + "] message: '" + getNonFunctionMessage() + "' }\n"
             + '    at: Test.<anonymous> ($TEST/throws.js:$LINE:$COL)\n'
             + '    stack: |-\n'
             + '      TypeError: ' + getNonFunctionMessage(undefined) + '\n'
@@ -53,7 +53,7 @@ tap.test('failures', function (tt) {
             + '    expected: |-\n'
             + '      undefined\n'
             + '    actual: |-\n'
-            + "      { [TypeError: " + getNonFunctionMessage(null) + "] message: '" + getNonFunctionMessage(null) + "' }\n"
+            + '      { [TypeError: ' + getNonFunctionMessage(null) + "] message: '" + getNonFunctionMessage(null) + "' }\n"
             + '    at: Test.<anonymous> ($TEST/throws.js:$LINE:$COL)\n'
             + '    stack: |-\n'
             + '      TypeError: ' + getNonFunctionMessage(null) + '\n'
@@ -67,7 +67,7 @@ tap.test('failures', function (tt) {
             + '    expected: |-\n'
             + '      undefined\n'
             + '    actual: |-\n'
-            + "      { [TypeError: " + getNonFunctionMessage(true) + "] message: '" + getNonFunctionMessage(true) + "' }\n"
+            + '      { [TypeError: ' + getNonFunctionMessage(true) + "] message: '" + getNonFunctionMessage(true) + "' }\n"
             + '    at: Test.<anonymous> ($TEST/throws.js:$LINE:$COL)\n'
             + '    stack: |-\n'
             + '      TypeError: ' + getNonFunctionMessage(true) + '\n'
@@ -81,7 +81,7 @@ tap.test('failures', function (tt) {
             + '    expected: |-\n'
             + '      undefined\n'
             + '    actual: |-\n'
-            + "      { [TypeError: " + getNonFunctionMessage(false) + "] message: '" + getNonFunctionMessage(false) + "' }\n"
+            + '      { [TypeError: ' + getNonFunctionMessage(false) + "] message: '" + getNonFunctionMessage(false) + "' }\n"
             + '    at: Test.<anonymous> ($TEST/throws.js:$LINE:$COL)\n'
             + '    stack: |-\n'
             + '      TypeError: ' + getNonFunctionMessage(false) + '\n'
@@ -95,7 +95,7 @@ tap.test('failures', function (tt) {
             + '    expected: |-\n'
             + '      undefined\n'
             + '    actual: |-\n'
-            + "      { [TypeError: " + getNonFunctionMessage('abc') + "] message: '" + getNonFunctionMessage('abc') + "' }\n"
+            + '      { [TypeError: ' + getNonFunctionMessage('abc') + "] message: '" + getNonFunctionMessage('abc') + "' }\n"
             + '    at: Test.<anonymous> ($TEST/throws.js:$LINE:$COL)\n'
             + '    stack: |-\n'
             + '      TypeError: ' + getNonFunctionMessage('abc') + '\n'
@@ -109,7 +109,7 @@ tap.test('failures', function (tt) {
             + '    expected: |-\n'
             + '      undefined\n'
             + '    actual: |-\n'
-            + "      { [TypeError: " + getNonFunctionMessage(/a/g) + "] message: '" + getNonFunctionMessage(/a/g) + "' }\n"
+            + '      { [TypeError: ' + getNonFunctionMessage(/a/g) + "] message: '" + getNonFunctionMessage(/a/g) + "' }\n"
             + '    at: Test.<anonymous> ($TEST/throws.js:$LINE:$COL)\n'
             + '    stack: |-\n'
             + '      TypeError: ' + getNonFunctionMessage(/a/g) + '\n'
@@ -123,7 +123,7 @@ tap.test('failures', function (tt) {
             + '    expected: |-\n'
             + '      undefined\n'
             + '    actual: |-\n'
-            + "      { [TypeError: " + getNonFunctionMessage([]) + "] message: '" + getNonFunctionMessage([]) + "' }\n"
+            + '      { [TypeError: ' + getNonFunctionMessage([]) + "] message: '" + getNonFunctionMessage([]) + "' }\n"
             + '    at: Test.<anonymous> ($TEST/throws.js:$LINE:$COL)\n'
             + '    stack: |-\n'
             + '      TypeError: ' + getNonFunctionMessage([]) + '\n'
@@ -137,7 +137,7 @@ tap.test('failures', function (tt) {
             + '    expected: |-\n'
             + '      undefined\n'
             + '    actual: |-\n'
-            + "      { [TypeError: " + getNonFunctionMessage({}) + "] message: '" + getNonFunctionMessage({}) + "' }\n"
+            + '      { [TypeError: ' + getNonFunctionMessage({}) + "] message: '" + getNonFunctionMessage({}) + "' }\n"
             + '    at: Test.<anonymous> ($TEST/throws.js:$LINE:$COL)\n'
             + '    stack: |-\n'
             + '      TypeError: ' + getNonFunctionMessage({}) + '\n'