Use npm test in the Makefile.

Makefile

@@ -7,7 +7,7 @@ all: \
 	package.json
 
 test: all
-	@node_modules/.bin/vows
+	@npm test
 
 benchmark: all
 	@node test/geo/benchmark.js

package.json

@@ -36,6 +36,6 @@
     "vows": "0.7.x"
   },
   "scripts": {
-    "test": "node_modules/.bin/vows"
+    "test": "node_modules/.bin/vows; echo"
   }
 }

src/package.js

@@ -38,6 +38,6 @@ console.log(JSON.stringify({
     "vows": "0.7.x"
   },
   "scripts": {
-    "test": "node_modules/.bin/vows"
+    "test": "node_modules/.bin/vows; echo"
   }
 }, null, 2));