diff --git a/definitions/npm/module-alias_v2.x.x/flow_v0.83.x-/module-alias_v2.x.x.js b/definitions/npm/module-alias_v2.x.x/flow_v0.83.x-/module-alias_v2.x.x.js
new file mode 100644
index 0000000000..e8bbf38be3
--- /dev/null
+++ b/definitions/npm/module-alias_v2.x.x/flow_v0.83.x-/module-alias_v2.x.x.js
@@ -0,0 +1,34 @@
+declare module 'module-alias' {
+  /**
+   * module intialis options type
+   */
+  declare export type Options = {|
+    base: string,
+  |};
+
+  declare module.exports: {|
+    /**
+     * Import aliases from package.json
+     */
+    (options?: string | Options): void,
+    isPathMatchesAlias(path: string, alias: string): boolean,
+    /**
+     * Register a custom modules directory
+     */
+    addPath(path: string): void,
+    /**
+     * Register a single alias
+     */
+    addAlias(alias: string, path: string): void,
+    /**
+     * Register multiple aliases
+     */
+    addAliases(aliases: { [alias: string]: string }): void,
+    /**
+     * Reset any changes maded (resets all registered aliases
+     * and custom module directories)
+     * The function is undocumented and for testing purposes only
+     */
+    reset(): void,
+  |};
+}
diff --git a/definitions/npm/module-alias_v2.x.x/flow_v0.83.x-/test_module-alias_v2.x.x.js b/definitions/npm/module-alias_v2.x.x/flow_v0.83.x-/test_module-alias_v2.x.x.js
new file mode 100644
index 0000000000..0e04923290
--- /dev/null
+++ b/definitions/npm/module-alias_v2.x.x/flow_v0.83.x-/test_module-alias_v2.x.x.js
@@ -0,0 +1,81 @@
+// @flow
+import { describe, test } from 'flow-typed-test';
+import moduleAlias from 'module-alias';
+
+describe('module-alias', () => {
+  test('default', () => {
+    (moduleAlias(): void);
+    moduleAlias('test');
+    moduleAlias({
+      base: 'test',
+    });
+
+    // $FlowExpectedError[incompatible-cast]
+    (moduleAlias(): string);
+    // $FlowExpectedError[incompatible-call]
+    moduleAlias(123);
+    // $FlowExpectedError[incompatible-call]
+    moduleAlias({});
+    // $FlowExpectedError[incompatible-call]
+    moduleAlias({ foo: 'bar' });
+  });
+
+  test('isPathMatchesAlias', () => {
+    (moduleAlias.isPathMatchesAlias('test', 'test'): boolean);
+
+    // $FlowExpectedError[incompatible-call]
+    moduleAlias.isPathMatchesAlias();
+    // $FlowExpectedError[incompatible-call]
+    moduleAlias.isPathMatchesAlias(123);
+    // $FlowExpectedError[incompatible-call]
+    moduleAlias.isPathMatchesAlias('test', 123);
+    // $FlowExpectedError[incompatible-cast]
+    (moduleAlias.isPathMatchesAlias('test', 'test'): string);
+  });
+
+  test('addPath', () => {
+    (moduleAlias.addPath('test'): void);
+
+    // $FlowExpectedError[incompatible-call]
+    moduleAlias.addPath();
+    // $FlowExpectedError[incompatible-call]
+    moduleAlias.addPath(123);
+    // $FlowExpectedError[incompatible-cast]
+    (moduleAlias.addPath('test'): string);
+  });
+
+  test('addAlias', () => {
+    (moduleAlias.addAlias('test', 'test'): void);
+
+    // $FlowExpectedError[incompatible-call]
+    moduleAlias.addAlias();
+    // $FlowExpectedError[incompatible-call]
+    moduleAlias.addAlias(123);
+    // $FlowExpectedError[incompatible-call]
+    moduleAlias.addAlias('test', 123);
+    // $FlowExpectedError[incompatible-cast]
+    (moduleAlias.addAlias('test', 'test'): string);
+  });
+
+  test('addAliases', () => {
+    (moduleAlias.addAliases({ foo: 'bar' }): void);
+
+    // $FlowExpectedError[incompatible-call]
+    moduleAlias.addAliases();
+    // $FlowExpectedError[incompatible-call]
+    moduleAlias.addAliases(123);
+    // $FlowExpectedError[incompatible-call]
+    moduleAlias.addAliases({ foo: 123 });
+    // $FlowExpectedError[incompatible-cast]
+    (moduleAlias.addAliases({ foo: 'bar' }): string);
+  });
+
+  test('reset', () => {
+    (moduleAlias.reset(): void);
+
+    // $FlowExpectedError[extra-arg]
+    moduleAlias.reset(123);
+    // $FlowExpectedError[incompatible-cast]
+    (moduleAlias.reset(): string);
+  });
+});