diff --git a/tests/functional/centos/7/cluster/group_vars/all b/tests/functional/centos/7/cluster/group_vars/all
index 0214cbff9..5c82ee74e 100644
--- a/tests/functional/centos/7/cluster/group_vars/all
+++ b/tests/functional/centos/7/cluster/group_vars/all
@@ -15,3 +15,7 @@ os_tuning_params:
   - { name: fs.file-max, value: 26234859 }
 user_config: True
 openstack_config: True
+ceph_conf_overrides:
+  global:
+    osd_pool_default_pg_num: 8
+    osd_pool_default_size: 1
diff --git a/tests/functional/centos/7/dmcrypt-dedicated-journal/group_vars/all b/tests/functional/centos/7/dmcrypt-dedicated-journal/group_vars/all
index 2357d9ee5..ec2b5d602 100644
--- a/tests/functional/centos/7/dmcrypt-dedicated-journal/group_vars/all
+++ b/tests/functional/centos/7/dmcrypt-dedicated-journal/group_vars/all
@@ -12,3 +12,7 @@ raw_journal_devices:
 os_tuning_params:
   - { name: kernel.pid_max, value: 4194303 }
   - { name: fs.file-max, value: 26234859 }
+ceph_conf_overrides:
+  global:
+    osd_pool_default_pg_num: 8
+    osd_pool_default_size: 1
diff --git a/tests/functional/centos/7/dmcrypt-journal-collocation/group_vars/all b/tests/functional/centos/7/dmcrypt-journal-collocation/group_vars/all
index 7ff9feb66..f1998acbb 100644
--- a/tests/functional/centos/7/dmcrypt-journal-collocation/group_vars/all
+++ b/tests/functional/centos/7/dmcrypt-journal-collocation/group_vars/all
@@ -11,3 +11,7 @@ devices:
 os_tuning_params:
   - { name: kernel.pid_max, value: 4194303 }
   - { name: fs.file-max, value: 26234859 }
+ceph_conf_overrides:
+  global:
+    osd_pool_default_pg_num: 8
+    osd_pool_default_size: 1
diff --git a/tests/functional/ubuntu/16.04/cluster/group_vars/all b/tests/functional/ubuntu/16.04/cluster/group_vars/all
index d9f58f30e..406426554 100644
--- a/tests/functional/ubuntu/16.04/cluster/group_vars/all
+++ b/tests/functional/ubuntu/16.04/cluster/group_vars/all
@@ -13,3 +13,7 @@ raw_multi_journal: True
 os_tuning_params:
   - { name: kernel.pid_max, value: 4194303 }
   - { name: fs.file-max, value: 26234859 }
+ceph_conf_overrides:
+  global:
+    osd_pool_default_pg_num: 8
+    osd_pool_default_size: 1