diff --git a/examples/__tests__/test-counter.ava.js b/examples/__tests__/test-counter.ava.js
index b8a94a0f..bf2cf03c 100644
--- a/examples/__tests__/test-counter.ava.js
+++ b/examples/__tests__/test-counter.ava.js
@@ -8,14 +8,31 @@ test.beforeEach(async (t) => {
   // Prepare sandbox for tests, create accounts, deploy contracts, etc.
   const root = worker.rootAccount;
 
+  let counterContract;
+
+  switch (process.env.COUNTER_CONTRACT_TYPE) {
+    case "COUNTER_LOW_LEVEL": {
+      counterContract = "./build/counter-lowlevel.wasm";
+      break;
+    }
+    case "COUNTER_TS": {
+      counterContract = "./build/counter-ts.wasm";
+      break;
+    }
+    case "COUNTER_JS": {
+      counterContract = "./build/counter.wasm";
+      break;
+    }
+    case "COUNTER_EXTENDED": {
+      counterContract = "./build/counter-extended.wasm";
+      break;
+    }
+    default:
+      throw Error("Unknown COUNTER_CONTRACT_TYPE");
+  }
+
   // Deploy the counter contract.
-  const counter = await root.devDeploy(
-    process.env["COUNTER_LOWLEVEL"]
-      ? "./build/counter-lowlevel.wasm"
-      : process.env["COUNTER_TS"]
-      ? "./build/counter-ts.wasm"
-      : "./build/counter.wasm"
-  );
+  const counter = await root.devDeploy(counterContract);
 
   // Test users
   const ali = await root.createSubAccount("ali");
diff --git a/examples/package.json b/examples/package.json
index d4d6fc3b..4ca27cfe 100644
--- a/examples/package.json
+++ b/examples/package.json
@@ -12,6 +12,7 @@
     "build:counter": "near-sdk-js build src/counter.js build/counter.wasm",
     "build:counter-lowlevel": "near-sdk-js build src/counter-lowlevel.js build/counter-lowlevel.wasm",
     "build:counter-ts": "near-sdk-js build src/counter.ts build/counter-ts.wasm",
+    "build:counter-extended": "near-sdk-js build src/counter-extended.ts build/counter-extended.wasm",
     "build:cross-contract-call": "near-sdk-js build src/status-message.js build/status-message.wasm && near-sdk-js build src/cross-contract-call.js build/cross-contract-call.wasm",
     "build:cross-contract-call-loop": "near-sdk-js build src/counter.js build/counter.wasm && near-sdk-js build src/cross-contract-call-loop.js build/cross-contract-call-loop.wasm",
     "build:fungible-token-lockable": "near-sdk-js build src/fungible-token-lockable.js build/fungible-token-lockable.wasm",
@@ -29,9 +30,10 @@
     "test:nft": "ava __tests__/standard-nft/*",
     "test:status-message": "ava __tests__/test-status-message.ava.js",
     "test:clean-state": "ava __tests__/test-clean-state.ava.js",
-    "test:counter": "ava __tests__/test-counter.ava.js",
-    "test:counter-lowlevel": "COUNTER_LOWLEVEL=1 ava __tests__/test-counter.ava.js",
-    "test:counter-ts": "COUNTER_TS=1 ava __tests__/test-counter.ava.js",
+    "test:counter": "COUNTER_CONTRACT_TYPE=COUNTER_JS ava __tests__/test-counter.ava.js",
+    "test:counter-lowlevel": "COUNTER_CONTRACT_TYPE=COUNTER_LOW_LEVEL ava __tests__/test-counter.ava.js",
+    "test:counter-ts": "COUNTER_CONTRACT_TYPE=COUNTER_TS ava __tests__/test-counter.ava.js",
+    "test:counter-extended": "COUNTER_CONTRACT_TYPE=COUNTER_EXTENDED ava __tests__/test-counter.ava.js",
     "test:cross-contract-call": "ava __tests__/test-cross-contract-call.ava.js",
     "test:cross-contract-call-loop": "ava __tests__/test-cross-contract-call-loop.ava.js",
     "test:fungible-token-lockable": "ava __tests__/test-fungible-token-lockable.ava.js",
diff --git a/examples/src/counter-extended.ts b/examples/src/counter-extended.ts
new file mode 100644
index 00000000..de1f23b9
--- /dev/null
+++ b/examples/src/counter-extended.ts
@@ -0,0 +1,11 @@
+import { near, NearBindgen, call } from "near-sdk-js";
+import { Counter } from "./counter";
+
+@NearBindgen({})
+export class CounterWithReset extends Counter {
+  @call({})
+  reset() {
+    this.count = 0;
+    near.log(`Counter is set to 0`);
+  }
+}