diff --git a/js-fixtures/fixtures.d.ts b/js-fixtures/fixtures.d.ts
new file mode 100644
index 000000000..fd9222fd2
--- /dev/null
+++ b/js-fixtures/fixtures.d.ts
@@ -0,0 +1,14 @@
+declare interface Fixtures {
+    path: string;
+    containerId: string;
+    set(html: string): void;
+    appendSet(html: string): void;
+    preload(...htmls: string[]): void;
+    load(...htmls: string[]): void;
+    appendLoad(...htmls: string[]): void;
+    read(...htmls: string[]): string;
+    clearCache(): void;
+    cleanUp(): void;
+}
+
+declare var fixtures: Fixtures;
\ No newline at end of file