diff --git a/justfile b/justfile
index c618940b..27caa652 100644
--- a/justfile
+++ b/justfile
@@ -281,6 +281,8 @@ nextest-install:
 # Ensure cargo-llvm-cov is available for local Rust coverage runs
 [unix]
 llvm-cov-install:
+    @echo "Ensuring llvm-tools-preview Rust component..."
+    vx rustup component add llvm-tools-preview
     @if vx cargo llvm-cov --version >/dev/null 2>&1; then \
         echo "cargo-llvm-cov already available"; \
     else \
diff --git a/tests/test_gallery_cdp.py b/tests/test_gallery_cdp.py
index 0a477af8..adbd59dd 100644
--- a/tests/test_gallery_cdp.py
+++ b/tests/test_gallery_cdp.py
@@ -55,7 +55,9 @@
 STARTUP_TIMEOUT = 120  # Gallery startup timeout (WebView2 cold-start on CI can be slow)
 API_TIMEOUT = 60  # API call timeout (some DCC samples need more time)
 EXAMPLE_RUN_TIMEOUT = 2  # Example run duration (reduced for faster tests)
-LOADING_TIMEOUT = 50  # Loading screen timeout before force-navigate (must be < _wait_for_ready timeout)
+LOADING_TIMEOUT = (
+    50  # Loading screen timeout before force-navigate (must be < _wait_for_ready timeout)
+)
 
 
 @dataclass