diff --git a/.gitignore b/.gitignore
index a4312877f..2a88247ec 100644
--- a/.gitignore
+++ b/.gitignore
@@ -3,5 +3,5 @@ coverage
 node_modules
 !node_modules/spawn-wrap
 test/built-*
-self_coverage
+.self_coverage
 *.covered.js
diff --git a/instrument-index.js b/build-self-coverage.js
similarity index 100%
rename from instrument-index.js
rename to build-self-coverage.js
diff --git a/lib/self-coverage-helper.js b/lib/self-coverage-helper.js
index a4d12e1b0..dcd69bae8 100644
--- a/lib/self-coverage-helper.js
+++ b/lib/self-coverage-helper.js
@@ -10,7 +10,7 @@ onExit(function () {
   if (typeof ___nyc_self_coverage___ === 'object') coverage = ___nyc_self_coverage___
   if (!coverage) return
 
-  var selfCoverageDir = path.join(__dirname, '../self_coverage')
+  var selfCoverageDir = path.join(__dirname, '../.self_coverage')
   mkdirp.sync(selfCoverageDir)
   fs.writeFileSync(
     path.join(selfCoverageDir, process.pid + '.json'),
diff --git a/package.json b/package.json
index 4bc55d2f2..2cbf2f9f0 100644
--- a/package.json
+++ b/package.json
@@ -4,15 +4,15 @@
   "description": "a code coverage tool that works well with subprocesses.",
   "main": "index.js",
   "scripts": {
-    "clean": "rm -rf ./.nyc_output && rm -rf ./test/fixtures/.nyc_output && rm -f ./index.covered.js ./lib/source-map-cache.covered.js && rm -rf ./self_coverage",
-    "build": "node ./build-tests",
     "pretest": "standard",
     "test": "npm run cover",
-    "cover": "npm run clean && npm run build && npm run instrument && npm run run-tests && npm run report",
-    "dev": "npm run clean && npm run build && npm run run-tests",
-    "instrument": "node ./instrument-index.js",
+    "clean": "rm -rf ./.nyc_output ./.self_coverage ./test/fixtures/.nyc_output && rm -f *covered.js ./lib/*covered.js test/built-*.js",
+    "build": "node ./build-tests",
+    "instrument": "node ./build-self-coverage.js",
+    "run-tests": "tap -b ./test/built-*.js ./test/source-map-cache.js",
     "report": "istanbul report --include=self_coverage/*.json lcov text",
-    "run-tests": "tap -b ./test/built-*.js ./test/source-map-cache.js"
+    "cover": "npm run clean && npm run build && npm run instrument && npm run run-tests && npm run report",
+    "dev": "npm run clean && npm run build && npm run run-tests"
   },
   "bin": {
     "nyc": "./bin/nyc.js"