diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index cbb9d90a..66c5e789 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -112,7 +112,7 @@ jobs:
       - name: tests
         if: matrix.target.os == 'ubuntu-latest'
         run: |
-          sudo bash -c "ulimit -Sl 512 && ulimit -Hl 512 && PATH=$PATH:/usr/share/rust/.cargo/bin && RUSTUP_TOOLCHAIN=stable cargo ci-test && RUSTUP_TOOLCHAIN=stable cargo ci-test-rt-linux && RUSTUP_TOOLCHAIN=stable cargo ci-test-server-linux"
+          sudo bash -c "ulimit -Sl 512 && ulimit -Hl 512 && PATH=$PATH:/usr/share/rust/.cargo/bin && RUSTUP_TOOLCHAIN=${matrix.version} cargo ci-test && RUSTUP_TOOLCHAIN=stable cargo ci-test-rt-linux && RUSTUP_TOOLCHAIN=stable cargo ci-test-server-linux"
 
       - name: Clear the cargo caches
         run: |
diff --git a/actix-server/tests/test_server.rs b/actix-server/tests/test_server.rs
index 1147a18f..315e3eff 100644
--- a/actix-server/tests/test_server.rs
+++ b/actix-server/tests/test_server.rs
@@ -142,6 +142,7 @@ fn test_start() {
     sys.stop();
     h.join().unwrap().unwrap();
 
+    thread::sleep(Duration::from_secs(1));
     assert!(net::TcpStream::connect(addr).is_err());
 }