diff --git a/ci/test-nightly.sh b/ci/test-nightly.sh
index 1402afc06..7cdec701b 100755
--- a/ci/test-nightly.sh
+++ b/ci/test-nightly.sh
@@ -13,7 +13,7 @@ _() {
 }
 
 # Uncomment this to run nightly test suit
-# _ cargo test --verbose --features=unstable
+# _ cargo test --verbose --features=unstable -- --test-threads=1
 
 maybe_cargo_install() {
   for cmd in "$@"; do
diff --git a/ci/test-stable-perf.sh b/ci/test-stable-perf.sh
index 4d69f9c82..fc9881b3a 100755
--- a/ci/test-stable-perf.sh
+++ b/ci/test-stable-perf.sh
@@ -24,7 +24,7 @@ source ./target/perf-libs/env.sh
 
 FEATURES=bpf_c,cuda,erasure,chacha
 _ cargo build --all --verbose --features="$FEATURES"
-_ cargo test --verbose --features="$FEATURES" --lib
+_ cargo test --verbose --features="$FEATURES" --lib -- --nocapture --test-threads=1
 
 # Run integration tests serially
 for test in tests/*.rs; do
diff --git a/ci/test-stable.sh b/ci/test-stable.sh
index 92428a687..3278d63e0 100755
--- a/ci/test-stable.sh
+++ b/ci/test-stable.sh
@@ -18,7 +18,7 @@ if [[ $(ulimit -n) -lt 65000 ]]; then
 fi
 
 _ cargo build --all --verbose
-_ cargo test --verbose --lib -- --nocapture
+_ cargo test --verbose --lib -- --nocapture --test-threads=1
 
 # Run integration tests serially
 for test in tests/*.rs; do