diff --git a/src/testing/mocks/middleware/block.ts b/src/testing/mocks/middleware/block.ts
new file mode 100644
index 000000000..637ca388e
--- /dev/null
+++ b/src/testing/mocks/middleware/block.ts
@@ -0,0 +1,24 @@
+import { create } from '../../../core/vdom';
+import { DefaultMiddlewareResult } from '../../../core/interfaces';
+
+const factory = create();
+
+export function createBlockMock(blocks: [Function, any][] = []) {
+	const blocksMockMap = new Map(blocks);
+	const mockBlockMiddleware = factory(() => {
+		return (block: any) => {
+			const mock = blocksMockMap.get(block);
+			if (mock) {
+				return mock;
+			}
+			return (() => {}) as any;
+		};
+	});
+
+	function mockBlock(): DefaultMiddlewareResult {
+		return mockBlockMiddleware();
+	}
+	return mockBlock;
+}
+
+export default createBlockMock;
diff --git a/tests/testing/unit/mocks/middleware/all.ts b/tests/testing/unit/mocks/middleware/all.ts
index d237b4887..5a28e381b 100644
--- a/tests/testing/unit/mocks/middleware/all.ts
+++ b/tests/testing/unit/mocks/middleware/all.ts
@@ -6,3 +6,4 @@ import './store';
 import './breakpoint';
 import './icache';
 import './validity';
+import './block';
diff --git a/tests/testing/unit/mocks/middleware/block.tsx b/tests/testing/unit/mocks/middleware/block.tsx
new file mode 100644
index 000000000..7d04ba564
--- /dev/null
+++ b/tests/testing/unit/mocks/middleware/block.tsx
@@ -0,0 +1,64 @@
+const { it } = intern.getInterface('bdd');
+const { describe } = intern.getPlugin('jsdom');
+import createBlockMock from '../../../../../src/testing/mocks/middleware/block';
+import block from '../../../../../src/core/middleware/block';
+import { tsx, create } from '../../../../../src/core/vdom';
+import renderer, { assertion } from '../../../../../src/testing/renderer';
+
+describe('block mock', () => {
+	it('should mock block middleware calls', () => {
+		function func() {
+			return null;
+		}
+		const blockMock = createBlockMock([[func, () => 'func result']]);
+		const factory = create({ block });
+		const App = factory(({ middleware: { block } }) => {
+			const blockResult = block(func)();
+			return <div key="root">{blockResult}</div>;
+		});
+		const r = renderer(() => <App key="app" />, { middleware: [[block, blockMock]] });
+		r.expect(assertion(() => <div key="root">func result</div>));
+	});
+
+	it('should deal with multiple mocked functions', () => {
+		function func(_: any) {
+			return null;
+		}
+		function func1() {
+			return null;
+		}
+		const blockMock = createBlockMock([[func, (foo: any) => foo], [func1, () => 'bar']]);
+		const factory = create({ block });
+		const App = factory(({ middleware: { block } }) => {
+			return (
+				<div>
+					<div key="root">{block(func)('foo')}</div>
+					<div key="other">{block(func1)()}</div>
+				</div>
+			);
+		});
+		const r = renderer(() => <App key="app" />, { middleware: [[block, blockMock]] });
+		r.expect(
+			assertion(() => (
+				<div>
+					<div key="root">foo</div>
+					<div key="other">bar</div>
+				</div>
+			))
+		);
+	});
+
+	it('should return a default', () => {
+		function func() {
+			return null;
+		}
+		const blockMock = createBlockMock();
+		const factory = create({ block });
+		const App = factory(({ middleware: { block } }) => {
+			const blockResult = block(func)();
+			return <div key="root">{blockResult}</div>;
+		});
+		const r = renderer(() => <App key="app" />, { middleware: [[block, blockMock]] });
+		r.expect(assertion(() => <div key="root" />));
+	});
+});