diff --git a/types/open-wc__testing-karma-bs/index.d.ts b/types/open-wc__testing-karma-bs/index.d.ts
new file mode 100644
index 0000000000..154b09c764
--- /dev/null
+++ b/types/open-wc__testing-karma-bs/index.d.ts
@@ -0,0 +1,12 @@
+// Type definitions for @open-wc/testing-karma-bs 1.3
+// Project: https://github.com/open-wc/open-wc/tree/master/packages/testing-karma-bs
+// Definitions by: Peter Błażejewicz <https://github.com/peterblazejewicz>
+// Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
+// TypeScript Version: 3.2
+/// <reference types="karma-browserstack-launcher" />
+
+import karma = require('karma');
+
+declare function testingKarma(): karma.ConfigOptions;
+
+export = testingKarma;
diff --git a/types/open-wc__testing-karma-bs/open-wc__testing-karma-bs-tests.ts b/types/open-wc__testing-karma-bs/open-wc__testing-karma-bs-tests.ts
new file mode 100644
index 0000000000..7735e5eed5
--- /dev/null
+++ b/types/open-wc__testing-karma-bs/open-wc__testing-karma-bs-tests.ts
@@ -0,0 +1,24 @@
+/// <reference types="node" />
+import karma = require('karma');
+import bsSettings = require('@open-wc/testing-karma-bs');
+import merge = require('lodash/merge');
+
+module.exports = (config: karma.Config) => {
+    config.set(
+        merge(bsSettings(), {
+            browserStack: {
+                accessKey: process.env.BROWSERSTACK_KEY,
+                apiClientEndpoint: 'https://api.browserstack.com',
+                project: 'open-wc',
+                username: process.env.BROWSERSTACK_USERNAME,
+            },
+            browsers: [
+                'bs_win10_chrome_latest',
+                'bs_win10_firefox_latest',
+                'bs_win10_edge_latest',
+                'bs_osxmojave_safari_latest',
+                'bs_win10_ie_11',
+            ],
+        }),
+    );
+};
diff --git a/types/open-wc__testing-karma-bs/tsconfig.json b/types/open-wc__testing-karma-bs/tsconfig.json
new file mode 100644
index 0000000000..d2ade1c364
--- /dev/null
+++ b/types/open-wc__testing-karma-bs/tsconfig.json
@@ -0,0 +1,28 @@
+{
+    "compilerOptions": {
+        "module": "commonjs",
+        "lib": [
+            "es6"
+        ],
+        "noImplicitAny": true,
+        "noImplicitThis": true,
+        "strictFunctionTypes": true,
+        "strictNullChecks": true,
+        "baseUrl": "../",
+        "typeRoots": [
+            "../"
+        ],
+        "types": [],
+        "noEmit": true,
+        "forceConsistentCasingInFileNames": true,
+        "paths": {
+            "@open-wc/testing-karma-bs": [
+                "open-wc__testing-karma-bs"
+            ]
+        }
+    },
+    "files": [
+        "index.d.ts",
+        "open-wc__testing-karma-bs-tests.ts"
+    ]
+}
diff --git a/types/open-wc__testing-karma-bs/tslint.json b/types/open-wc__testing-karma-bs/tslint.json
new file mode 100644
index 0000000000..3db14f85ea
--- /dev/null
+++ b/types/open-wc__testing-karma-bs/tslint.json
@@ -0,0 +1 @@
+{ "extends": "dtslint/dt.json" }