diff --git a/.github/workflows/merge.yml b/.github/workflows/merge.yml
index 60faed6af6..756bb6ef3c 100644
--- a/.github/workflows/merge.yml
+++ b/.github/workflows/merge.yml
@@ -222,7 +222,7 @@ jobs:
 
       # only these unit tests require a network, the rest are run above in unit test section
       - name: Run autonomi --tests
-        run: cargo test --package autonomi --tests -- --nocapture
+        run: cargo test --package autonomi --tests -- --nocapture --test-threads=1
         env:
           ANT_LOG: "v"
           # only set the target dir for windows to bypass the linker issue.