diff --git a/types/stream-mock/index.d.ts b/types/stream-mock/index.d.ts
new file mode 100644
index 0000000000..058dcbc6b4
--- /dev/null
+++ b/types/stream-mock/index.d.ts
@@ -0,0 +1,27 @@
+// Type definitions for stream-mock 1.2.0
+// Project: https://github.com/BastienAr/stream-mock
+// Definitions by: Ivan Kerin <https://github.com/ivank>
+// Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
+
+/// <reference types="node" />
+
+import {
+    Readable,
+    ReadableOptions,
+    WritableOptions,
+    Writable,
+    Duplex,
+    DuplexOptions
+} from "stream";
+
+export class ReadableMock extends Readable {
+    constructor(source: any[], opts?: ReadableOptions);
+}
+export class WritableMock extends Writable {
+    data: any;
+    flatData: any;
+}
+export class DuplexMock extends Duplex {
+    data: any;
+    flatData: any;
+}
diff --git a/types/stream-mock/stream-mock-tests.ts b/types/stream-mock/stream-mock-tests.ts
new file mode 100644
index 0000000000..c77275b129
--- /dev/null
+++ b/types/stream-mock/stream-mock-tests.ts
@@ -0,0 +1,15 @@
+import { ReadableMock, WritableMock, DuplexMock } from "stream-mock";
+
+const reader = new ReadableMock(["a", "b"], { objectMode: true });
+const writer = new WritableMock({ objectMode: true });
+const duplex = new DuplexMock({
+    readableObjectMode: true,
+    writableObjectMode: true
+});
+
+reader.pipe(duplex).pipe(writer);
+
+writer.on("finish", () => {
+    console.log(duplex.data, duplex.flatData);
+    console.log(writer.data, writer.flatData);
+});
diff --git a/types/stream-mock/tsconfig.json b/types/stream-mock/tsconfig.json
new file mode 100644
index 0000000000..7939a34354
--- /dev/null
+++ b/types/stream-mock/tsconfig.json
@@ -0,0 +1,16 @@
+{
+    "compilerOptions": {
+        "module": "commonjs",
+        "lib": ["es6"],
+        "noImplicitAny": true,
+        "noImplicitThis": true,
+        "strictNullChecks": true,
+        "strictFunctionTypes": true,
+        "baseUrl": "../",
+        "typeRoots": ["../"],
+        "types": [],
+        "noEmit": true,
+        "forceConsistentCasingInFileNames": true
+    },
+    "files": ["index.d.ts", "stream-mock-tests.ts"]
+}
diff --git a/types/stream-mock/tslint.json b/types/stream-mock/tslint.json
new file mode 100644
index 0000000000..3db14f85ea
--- /dev/null
+++ b/types/stream-mock/tslint.json
@@ -0,0 +1 @@
+{ "extends": "dtslint/dt.json" }