diff --git a/.github/workflows/check.yml b/.github/workflows/check.yml
index 0f836b80c71..fe5fcbcb873 100644
--- a/.github/workflows/check.yml
+++ b/.github/workflows/check.yml
@@ -17,6 +17,8 @@ jobs:
     steps:
       - name: "ACTIONS: Checkout"
         uses: actions/checkout@v4
+        with:
+          submodules: recursive
 
       - name: "Install: Set cargo path"
         run: echo "/tmp/cargo/bin" >> $GITHUB_PATH
@@ -24,6 +26,28 @@ jobs:
       - name: "Install: Rust toolchain"
         uses: dsherret/rust-toolchain-file@v1
 
+      - name: "Install: Foundry"
+        uses: foundry-rs/foundry-toolchain@v1
+        with:
+          version: nightly
+
+      - name: "Install: Node.js"
+        uses: actions/setup-node@v4
+        with:
+          node-version: 20.x
+
+      - name: "Show: Versioning"
+        run: |
+          ./scripts/gear.sh show
+          forge --version
+
+      - name: "Check: ethexe contracts"
+        run: |
+          cd ethexe/contracts
+          forge fmt --check
+          forge build --sizes
+          forge test -vvv
+
       - name: "Check formatting: Gear"
         run: ./scripts/gear.sh format gear --check
 
diff --git a/ethexe/observer/Cargo.toml b/ethexe/observer/Cargo.toml
index 4419eb5abcf..4cec8acf115 100644
--- a/ethexe/observer/Cargo.toml
+++ b/ethexe/observer/Cargo.toml
@@ -32,7 +32,7 @@ alloy = { workspace = true, features = [
 async-stream.workspace = true
 async-trait.workspace = true
 parity-scale-codec = { workspace = true, features = ["std", "derive"] }
-tokio = { workspace = true, features = ["fs"] }
+tokio = { workspace = true, features = ["rt-multi-thread", "fs"] }
 futures.workspace = true
 reqwest = { workspace = true, features = ["default-tls", "json"] }
 log.workspace = true
diff --git a/ethexe/observer/src/observer.rs b/ethexe/observer/src/observer.rs
index 1610823a0ed..46938fa0ca5 100644
--- a/ethexe/observer/src/observer.rs
+++ b/ethexe/observer/src/observer.rs
@@ -228,7 +228,7 @@ mod tests {
         wat2wasm_with_validate(s, true)
     }
 
-    #[tokio::test]
+    #[tokio::test(flavor = "multi_thread")]
     async fn test_deployment() -> Result<()> {
         let anvil = Anvil::new().try_spawn()?;
         let ethereum_rpc = anvil.ws_endpoint();