@@ -115,7 +115,10 @@ function specs::run() {
   nodes=1
 
   if [[ "${parallel}" == "true" ]]; then
-    nodes=3
+    # Honour GINKGO_NODES from the CI pipeline (defaults to 3) so parallelism can be
+    # tuned per environment -- e.g. lowered on the single-AZ buildpacks test CF where
+    # heavy Rails fixtures otherwise saturate the one Diego cell.
+    nodes="${GINKGO_NODES:-3}"
     serial_flag=""
   fi