diff --git a/.github/actions/plan/plan.js b/.github/actions/plan/plan.js
index 3c8c4c3..f6db51a 100644
--- a/.github/actions/plan/plan.js
+++ b/.github/actions/plan/plan.js
@@ -63,6 +63,7 @@ const codeModes = {
     cargoCommand: "test",
     cargoArgs: "--workspace",
     cargoCacheKey: "test",
+    needsEchoServer: true,
   },
   test_wasm: {
     name: "test (wasm)",
@@ -70,6 +71,7 @@ const codeModes = {
     cargoArgs: "--workspace --target wasm32-unknown-unknown",
     platformIndependent: true,
     cargoCacheKey: "test-wasm",
+    needsEchoServer: true,
   },
   build: {
     name: "build",
diff --git a/.github/workflows/code.yml b/.github/workflows/code.yml
index f15620b..94b0459 100644
--- a/.github/workflows/code.yml
+++ b/.github/workflows/code.yml
@@ -83,6 +83,10 @@ jobs:
           cargo clippy --version
           env
 
+      - name: Build and run the test echo server
+        run: cargo run --bin xwt-test-echo-server
+        if: ${{ matrix.plan.mode.needsEchoServer }}
+
       - name: Run cargo ${{ matrix.plan.mode.cargoCommand }}
         uses: actions-rs/cargo@v1
         with: