diff --git a/circle.yml b/circle.yml
index d8b033597..69c988545 100644
--- a/circle.yml
+++ b/circle.yml
@@ -33,7 +33,7 @@ dependencies:
       if [[ "$CIRCLE_NODE_TOTAL" < "2" ]] || [[ "$CIRCLE_NODE_INDEX" == "1" ]]; then make -C tests test-zstream             && make clean; fi
     - |
       if [[ "$CIRCLE_NODE_INDEX" == "0" ]]; then make -C tests test-zstd  && make clean; fi
-      if [[ "$CIRCLE_NODE_TOTAL" < "2" ]] || [[ "$CIRCLE_NODE_INDEX" == "1" ]]; then make -C tests test-fuzzer              && make clean; fi
+      if [[ "$CIRCLE_NODE_TOTAL" < "2" ]] || [[ "$CIRCLE_NODE_INDEX" == "1" ]]; then make -C tests test-fuzzer FUZZERTEST=-T4mn && make clean; fi
 
 test:
   override: