diff --git a/.circleci/config.yml b/.circleci/config.yml
index 2448862b5..aaebac075 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -24,10 +24,10 @@ parameters:
     default: '0.8.18'
   flaky_test:
     type: string
-    default: ''
+    default: 'isolation_shard_rebalancer_progress'
   flaky_test_make:
     type: string
-    default: check-minimal
+    default: check-isolation-base
 
 
 jobs:
@@ -539,7 +539,7 @@ jobs:
 
   test-flakyness:
     description: Runs a test multiple times to see if it's flaky
-    parallelism: 32
+    parallelism: 64
     parameters:
       pg_major:
         description: 'postgres major version'
@@ -561,7 +561,7 @@ jobs:
       runs:
         description: 'number of times that the test should be run in total'
         type: integer
-        default: 1600
+        default: 2400
     docker:
       - image: '<< parameters.image >>:<< parameters.image_tag >><< pipeline.parameters.image_suffix >>'
     working_directory: /home/circleci/project
diff --git a/src/test/regress/spec/isolation_shard_rebalancer_progress.spec b/src/test/regress/spec/isolation_shard_rebalancer_progress.spec
index 636723181..d46a011d7 100644
--- a/src/test/regress/spec/isolation_shard_rebalancer_progress.spec
+++ b/src/test/regress/spec/isolation_shard_rebalancer_progress.spec
@@ -1,8 +1,4 @@
 setup
-{
-	CALL citus_cleanup_orphaned_shards();
-}
-setup
 {
 	ALTER SEQUENCE pg_catalog.pg_dist_shardid_seq RESTART 1500001;
 	SET citus.shard_count TO 4;