diff --git a/.github/workflows/main.yaml b/.github/workflows/main.yaml
index e903d27..f693ccb 100644
--- a/.github/workflows/main.yaml
+++ b/.github/workflows/main.yaml
@@ -15,7 +15,7 @@ env:
   RUST_TOOLCHAIN: 1.74.0
   EXASOL_VERSION: 7.0.22
   NUM_NODES: 4
-  ETL_TEST_THREADS: 8
+  ETL_TEST_THREADS: 4
   ETL_JOB_TIMEOUT: 15
   EXA_CLUSTER_SETUP_TIMEOUT: 15