diff --git a/.eslintrc b/.eslintrc
index 9decf5e4..1854a48b 100644
--- a/.eslintrc
+++ b/.eslintrc
@@ -59,6 +59,7 @@
         "wrap-iife": ["error", "outside", {
             "functionPrototypeMethods": true,
         }],
+        "wrap-regex": "error",
     },
     "ignorePatterns": [ "syntax-error.*" ],
     "overrides": [
diff --git a/lib/default_stream.js b/lib/default_stream.js
index 75458a9d..b750eab8 100644
--- a/lib/default_stream.js
+++ b/lib/default_stream.js
@@ -19,7 +19,7 @@ module.exports = function () {
     }
 
     function flush() {
-        if (fs.writeSync && /^win/.test(process.platform)) {
+        if (fs.writeSync && (/^win/).test(process.platform)) {
             try { fs.writeSync(1, line + '\n'); }
             catch (e) { stream.emit('error', e); }
         } else {
diff --git a/test/async-await.js b/test/async-await.js
index ef88ff01..b380dfaa 100644
--- a/test/async-await.js
+++ b/test/async-await.js
@@ -36,7 +36,7 @@ tap.test('async2', function (t) {
     runProgram('async-await', 'async2.js', function (r) {
         var stdout = r.stdout.toString('utf8');
         var lines = stdout.split('\n').filter(function (line) {
-            return !/^(\s+)at(\s+)<anonymous>$/.test(line);
+            return !(/^(\s+)at(\s+)<anonymous>$/).test(line);
         });
 
         t.same(stripFullStack(lines.join('\n')), [
@@ -184,9 +184,9 @@ tap.test('sync-error', function (t) {
         var stderr = r.stderr.toString('utf8');
         var lines = stderr.split('\n');
         lines = lines.filter(function (line) {
-            return !/\(timers.js:/.test(line)
-                && !/\(internal\/timers.js:/.test(line)
-                && !/Immediate\.next/.test(line);
+            return !(/\(timers.js:/).test(line)
+                && !(/\(internal\/timers.js:/).test(line)
+                && !(/Immediate\.next/).test(line);
         });
         stderr = lines.join('\n');
 
@@ -211,7 +211,7 @@ tap.test('async-error', function (t) {
         var stdout = r.stdout.toString('utf8');
         var lines = stdout.split('\n');
         lines = lines.filter(function (line) {
-            return !/^(\s+)at(\s+)<anonymous>$/.test(line);
+            return !(/^(\s+)at(\s+)<anonymous>$/).test(line);
         });
         stdout = lines.join('\n');
 
@@ -240,9 +240,9 @@ tap.test('async-error', function (t) {
         var stderr = r.stderr.toString('utf8');
         var lines = stderr.split('\n');
         lines = lines.filter(function (line) {
-            return !/\(timers.js:/.test(line)
-                && !/\(internal\/timers.js:/.test(line)
-                && !/Immediate\.next/.test(line);
+            return !(/\(timers.js:/).test(line)
+                && !(/\(internal\/timers.js:/).test(line)
+                && !(/Immediate\.next/).test(line);
         });
         stderr = lines.join('\n');
 
@@ -256,7 +256,7 @@ tap.test('async-bug', function (t) {
         var stdout = r.stdout.toString('utf8');
         var lines = stdout.split('\n');
         lines = lines.filter(function (line) {
-            return !/^(\s+)at(\s+)<anonymous>$/.test(line);
+            return !(/^(\s+)at(\s+)<anonymous>$/).test(line);
         });
         stdout = lines.join('\n');
 
diff --git a/test/ignore_from_gitignore.js b/test/ignore_from_gitignore.js
index cda47b84..8260c2ec 100644
--- a/test/ignore_from_gitignore.js
+++ b/test/ignore_from_gitignore.js
@@ -110,7 +110,7 @@ tap.test('Should fail when ignore file does not exist', { skip: process.platform
     };
 
     var testStderr = function (rows) {
-        tt.ok(/^ENOENT[:,] no such file or directory,? (?:open )?'\$TEST\/ignore\/.gitignore'\n$/m.test(stripFullStack(rows.toString('utf8')).join('\n')));
+        tt.ok((/^ENOENT[:,] no such file or directory,? (?:open )?'\$TEST\/ignore\/.gitignore'\n$/m).test(stripFullStack(rows.toString('utf8')).join('\n')));
     };
 
     var ps = spawn(tapeBin, ['**/*.js', '-i'], { cwd: path.join(__dirname, 'ignore') });
diff --git a/test/promise_fail.js b/test/promise_fail.js
index fc38fb75..a814917b 100644
--- a/test/promise_fail.js
+++ b/test/promise_fail.js
@@ -15,12 +15,12 @@ tap.test('callback returning rejected promise should cause that test (and only t
     ps.stdout.pipe(concat(function (rows) {
         var rowsString = rows.toString('utf8');
 
-        if (/^skip\n$/.test(rowsString)) {
+        if ((/^skip\n$/).test(rowsString)) {
             return tt.pass('the test file indicated it should be skipped');
         }
 
         var strippedString = stripFullStack(rowsString).filter(function (line) {
-            return !/^(\s+)at(\s+)(?:Test\.)?<anonymous>(?:$|\s)/.test(line);
+            return !(/^(\s+)at(\s+)(?:Test\.)?<anonymous>(?:$|\s)/).test(line);
         }).join('\n');
 
         // hack for consistency across all versions of node
@@ -63,12 +63,12 @@ tap.test('subtest callback returning rejected promise should cause that subtest
     ps.stdout.pipe(concat(function (rows) {
         var rowsString = rows.toString('utf8');
 
-        if (/^skip\n$/.test(rowsString)) {
+        if ((/^skip\n$/).test(rowsString)) {
             return tt.pass('the test file indicated it should be skipped');
         }
 
         var strippedString = stripFullStack(rowsString).filter(function (line) {
-            return !/^(\s+)at(\s+)(?:Test\.)?<anonymous>(?:$|\s)/.test(line);
+            return !(/^(\s+)at(\s+)(?:Test\.)?<anonymous>(?:$|\s)/).test(line);
         }).join('\n');
 
         // hack for consistency across all versions of node
diff --git a/test/stackTrace.js b/test/stackTrace.js
index 7906884f..fd3fedfd 100644
--- a/test/stackTrace.js
+++ b/test/stackTrace.js
@@ -171,7 +171,7 @@ tap.test('preserves stack trace for failed assertions', function (tt) {
         tt.equal(typeof data.diag.stack, 'string');
         var at = data.diag.at || '';
         stack = data.diag.stack || '';
-        tt.ok(/^Error: true should be false(\n    at .+)+/.exec(stack), 'stack should be a stack');
+        tt.ok((/^Error: true should be false(\n    at .+)+/).exec(stack), 'stack should be a stack');
         tt.deepEqual(data, {
             ok: false,
             id: 1,
@@ -236,7 +236,7 @@ tap.test('preserves stack trace for failed assertions where actual===falsy', fun
         tt.equal(typeof data.diag.stack, 'string');
         var at = data.diag.at || '';
         stack = data.diag.stack || '';
-        tt.ok(/^Error: false should be true(\n    at .+)+/.exec(stack), 'stack should be a stack');
+        tt.ok((/^Error: false should be true(\n    at .+)+/).exec(stack), 'stack should be a stack');
         tt.deepEqual(data, {
             ok: false,
             id: 1,