diff --git a/bin/cmd.js b/bin/cmd.js
index 2c12800..d978228 100755
--- a/bin/cmd.js
+++ b/bin/cmd.js
@@ -12,7 +12,8 @@ var spawn = require('child_process').spawn;
 var fs = require('fs');
 var path = require('path');
 
-function jsFile(x) { return (/\.js$/i).test(x); }
+var regexTester = require('safe-regex-test');
+var jsFile = regexTester(/\.js$/i);
 
 var argv = minimist(process.argv.slice(2));
 var tap = faucet({
diff --git a/index.js b/index.js
index ea05592..6482556 100644
--- a/index.js
+++ b/index.js
@@ -7,6 +7,10 @@ var sprintf = require('sprintf-js').sprintf;
 var forEach = require('array.prototype.foreach');
 var push = require('array.prototype.push');
 var trim = require('string.prototype.trim');
+var regexTester = require('safe-regex-test');
+
+var isPassing = regexTester(/^(tests|pass)\s+\d+$/);
+var isFailing = regexTester(/^fail\s+\d+$/);
 
 module.exports = function (opts) {
 	var tap = parser();
@@ -32,7 +36,7 @@ module.exports = function (opts) {
 			test
 			&& test.ok
 			&& test.assertions.length === 0
-			&& (/^(tests|pass)\s+\d+$/).test(test.name)
+			&& isPassing(test.name)
 		) {
 			push(out, '\r' + trimWidth(test.name));
 		} else if (test && test.ok) {
@@ -90,7 +94,7 @@ module.exports = function (opts) {
 	var dup = duplexer(tap, out);
 
 	tap.on('results', function (res) {
-		if (test && (/^fail\s+\d+$/).test(test.name)) {
+		if (test && isFailing(test.name)) {
 			push(out, updateName(test.offset + 1, '⨯ ' + test.name, 31));
 		} else if (test && test.ok) {
 			push(out, updateName(test.offset + 1, '✓ ' + test.name, 32));
@@ -104,7 +108,7 @@ module.exports = function (opts) {
 			));
 		});
 
-		if (!res.ok && !(/^fail\s+\d+$/).test(test && test.name)) {
+		if (!res.ok && !isFailing(test && test.name)) {
 			push(out, sprintf(
 				'\r\x1b[1m\x1b[31m⨯ fail  %s\x1b[0m\x1b[K\n',
 				(res.errors.length + res.fail.length) || ''
diff --git a/package.json b/package.json
index b7a4e51..2abbea2 100644
--- a/package.json
+++ b/package.json
@@ -17,6 +17,7 @@
 		"duplexer": "^0.1.2",
 		"minimist": "^1.2.6",
 		"npm-which": "^1.0.2",
+		"safe-regex-test": "^1.0.0",
 		"sprintf-js": "^1.1.2",
 		"string.prototype.trim": "^1.2.6",
 		"tap-parser": "^0.4.3",