diff --git a/src/tsconfig.spec.json b/src/tsconfig.spec.json
new file mode 100644
index 0000000..0a65d17
--- /dev/null
+++ b/src/tsconfig.spec.json
@@ -0,0 +1,18 @@
+{
+    "extends": "../tsconfig.json",
+    "compilerOptions": {
+        "outDir": "../out-tsc/spec",
+        "types": [
+            "jasmine",
+            "node"
+        ]
+    },
+    "files": [
+        "test.ts",
+        "polyfills.ts"
+    ],
+    "include": [
+        "**/*.spec.ts",
+        "**/*.d.ts"
+    ]
+}