Refactor tests

README-rust.md

@@ -18,7 +18,11 @@ tested with.
 
 To run them, use:
 
-    cargo test --features=simulator,tokio
+    cargo test --features=simulator,tokio -- --test-threads 1
+
+Use `--nocapture` to also see some useful simulator output.
+
+    cargo test --features=simulator,tokio -- --test-threads 1 --nocapture
 
 If you want to test against a custom simulator build (e.g. when developing new firmware features),
 you can run:

ci.sh

@@ -24,7 +24,7 @@ cargo fmt --check
 
 for feature_set in "${features[@]}"; do
   echo $feature_set
-  cargo test --tests --locked --features="$feature_set" -- --nocapture
+  cargo test --tests --locked --features="$feature_set" -- --nocapture --test-threads 1
   cargo clippy --tests --locked --features="$feature_set" -- -D warnings -A clippy::empty-docs
 done