diff --git a/package.json b/package.json
index 1f395ff..ffc5fb4 100644
--- a/package.json
+++ b/package.json
@@ -87,6 +87,7 @@
     ],
     "env": {
       "test": {
+        "sourceMaps": "inline",
         "presets": [
           "babel-preset-power-assert"
         ],
@@ -101,10 +102,10 @@
               ]
             }
           ]
-        ],
-        "sourceMaps": "inline"
+        ]
       },
       "development": {
+        "sourceMaps": "inline",
         "presets": [
           "babel-preset-power-assert"
         ],
@@ -119,10 +120,10 @@
               ]
             }
           ]
-        ],
-        "sourceMaps": "inline"
+        ]
       },
       "production": {
+        "sourceMaps": "inline",
         "plugins": [
           "babel-plugin-unassert",
           [
@@ -135,8 +136,7 @@
               ]
             }
           ]
-        ],
-        "sourceMaps": "inline"
+        ]
       }
     }
   }