diff --git a/package.json b/package.json
index 3c173a7..1050ebe 100644
--- a/package.json
+++ b/package.json
@@ -30,8 +30,10 @@
   },
   "homepage": "https://github.com/testdouble/scripty#readme",
   "devDependencies": {
-    "assert": "^1.3.0",
+    "espower": "power-assert-js/espower#embedded-recorder",
+    "espower-loader": "^1.0.0",
     "intercept-stdout": "^0.1.2",
+    "power-assert": "^1.3.1",
     "semver": "^5.1.0",
     "standard": "^6.0.8",
     "teenytest": "^3.0.0",
diff --git a/test/safe-helper.js b/test/safe-helper.js
index 118208e..21a2d6b 100644
--- a/test/safe-helper.js
+++ b/test/safe-helper.js
@@ -1,5 +1,10 @@
+require('espower-loader')({
+  cwd: process.cwd(),
+  pattern: 'test/safe/**/*.js'
+})
+
 var decorateAssertions = require('./decorate-assertions')
-global.assert = decorateAssertions(require('assert'))
+global.assert = decorateAssertions(require('power-assert'))
 
 var log = require('../lib/log')
 
diff --git a/test/unit-helper.js b/test/unit-helper.js
index c695b96..700cb61 100644
--- a/test/unit-helper.js
+++ b/test/unit-helper.js
@@ -1,7 +1,12 @@
+require('espower-loader')({
+  cwd: process.cwd(),
+  pattern: 'lib/**/*.test.js'
+})
+
 global.td = require('testdouble')
 
 var decorateAssertions = require('./decorate-assertions')
-global.assert = decorateAssertions(require('assert'))
+global.assert = decorateAssertions(require('power-assert'))
 
 var log = require('../lib/log')