diff --git a/auto_test.sh b/auto_test.sh
index 9e93381..5412194 100755
--- a/auto_test.sh
+++ b/auto_test.sh
@@ -6,4 +6,4 @@ cargo install cargo-watch
 # Run the tests on change
 # Set RUST_BACKTRACE to 1 to see a short backtrace in case of an error
 # Set RUST_BACKTRACE to "full" to see a full backtrace in case of an error
-RUST_BACKTRACE=0 cargo watch -x "test -- --nocapture"
+RUST_BACKTRACE=0 cargo watch -x "test -- --nocapture --test-threads 1"