diff --git a/soroban-hello-world/contracts/hello-world/src/test.rs b/soroban-hello-world/contracts/hello-world/src/test.rs
new file mode 100644
index 000000000..af69a7ecb
--- /dev/null
+++ b/soroban-hello-world/contracts/hello-world/src/test.rs
@@ -0,0 +1,21 @@
+#![cfg(test)]
+
+use super::*;
+use soroban_sdk::{vec, Env, String};
+
+#[test]
+fn test() {
+    let env = Env::default();
+    let contract_id = env.register_contract(None, Contract);
+    let client = ContractClient::new(&env, &contract_id);
+
+    let words = client.hello(&String::from_str(&env, "Dev"));
+    assert_eq!(
+        words,
+        vec![
+            &env,
+            String::from_str(&env, "Hello"),
+            String::from_str(&env, "Dev"),
+        ]
+    );
+}
diff --git a/soroban-hello-world/contracts/increment/src/lib.rs b/soroban-hello-world/contracts/increment/src/lib.rs
new file mode 100644
index 000000000..1e914d808
--- /dev/null
+++ b/soroban-hello-world/contracts/increment/src/lib.rs
@@ -0,0 +1,26 @@
+#![no_std]
+use soroban_sdk::{contract, contractimpl, log, symbol_short, Env, Symbol};
+
+const COUNTER: Symbol = symbol_short!("COUNTER");
+
+#[contract]
+pub struct Contract;
+
+#[contractimpl]
+impl Contract {
+    pub fn increment(env: Env) -> u32 {
+        let mut count: u32 = env.storage().instance().get(&COUNTER).unwrap_or(0);
+
+        count += 1;
+
+        log!(&env, "count: {}", count);
+
+        env.storage().instance().set(&COUNTER, &count);
+
+        env.storage().instance().extend_tt1(100, 100);
+
+        count
+    }
+}
+
+mod test;