diff --git a/library/blivet.py b/library/blivet.py
index efcf0b26..3a0e73ee 100644
--- a/library/blivet.py
+++ b/library/blivet.py
@@ -1853,8 +1853,8 @@ def _manage_members(self):
                 pv.format.update_size_info()  # set pv to be resizable
 
                 if pv.format.resizable:
-                    pv.grow_to_fill = True
-                    ac = ActionResizeFormat(pv, self._device.size)
+                    pv.format.grow_to_fill = True
+                    ac = ActionResizeFormat(pv, pv.size)
                     self._blivet.devicetree.actions.add(ac)
                 else:
                     log.warning("cannot grow/resize PV '%s', format is not resizable", pv.name)
diff --git a/tests/scripts/does_library_support.py b/tests/scripts/does_library_support.py
index 2044a87e..993b90b5 100755
--- a/tests/scripts/does_library_support.py
+++ b/tests/scripts/does_library_support.py
@@ -59,4 +59,5 @@ def is_supported(var):
         print("Usage: python %s <parameter>" % sys.argv[0])
         sys.exit(-1)
 
-    print(is_supported(sys.argv[1]))
+    ret = is_supported(sys.argv[1])
+    sys.exit(0) if ret else sys.exit(1)
diff --git a/tests/test-verify-pool-members.yml b/tests/test-verify-pool-members.yml
index d56ebf45..757070ea 100644
--- a/tests/test-verify-pool-members.yml
+++ b/tests/test-verify-pool-members.yml
@@ -78,6 +78,7 @@
     executable: "{{ ansible_python.executable }}"
   register: grow_supported
   changed_when: false
+  failed_when: grow_supported.rc not in [0, 1]
 
 - name: Verify that PVs fill the whole devices when they should
   include_tasks: verify-pool-member-pvsize.yml
@@ -85,7 +86,7 @@
   loop_control:
     loop_var: st_pool_pv
   when:
-    - grow_supported.stdout | trim == 'True'
+    - grow_supported.rc == 0
     - storage_test_pool.type == "lvm"
     - storage_test_pool.grow_to_fill | bool
 
diff --git a/tests/tests_lvm_pool_pv_grow.yml b/tests/tests_lvm_pool_pv_grow.yml
index a039ec5f..a3aaa000 100644
--- a/tests/tests_lvm_pool_pv_grow.yml
+++ b/tests/tests_lvm_pool_pv_grow.yml
@@ -4,11 +4,7 @@
   become: true
   vars:
     storage_safe_mode: false
-    mount_location1: '/opt/test1'
-    mount_location2: '/opt/test2'
     pv_size: '8g'
-    volume1_size: '2g'
-    volume2_size: '3g'
   tags:
     - tests::lvm
 
@@ -57,11 +53,7 @@
             state: present
             volumes:
               - name: test1
-                size: "{{ volume1_size }}"
-                mount_point: "{{ mount_location1 }}"
-              - name: test2
-                size: "{{ volume2_size }}"
-                mount_point: "{{ mount_location2 }}"
+                size: 100%
 
     - name: Verify role results
       include_tasks: verify-role-results.yml
@@ -77,11 +69,7 @@
             state: present
             volumes:
               - name: test1
-                size: "{{ volume1_size }}"
-                mount_point: "{{ mount_location1 }}"
-              - name: test2
-                size: "{{ volume2_size }}"
-                mount_point: "{{ mount_location2 }}"
+                size: 100%
 
     - name: Verify role results
       include_tasks: verify-role-results.yml
@@ -96,7 +84,6 @@
             state: "absent"
             volumes:
               - name: test1
-              - name: test2
 
     - name: Verify role results
       include_tasks: verify-role-results.yml
diff --git a/tests/verify-pool-member-pvsize.yml b/tests/verify-pool-member-pvsize.yml
index d156e164..0685ad3c 100644
--- a/tests/verify-pool-member-pvsize.yml
+++ b/tests/verify-pool-member-pvsize.yml
@@ -4,21 +4,28 @@
   register: actual_pv_size
   changed_when: false
 
+- name: Get PE start for the PV
+  command: "pvs --noheadings --nosuffix --units b -o PESTART {{ st_pool_pv }}"
+  register: pv_pe_start
+  changed_when: false
+
 - name: Convert blkinfo size to bytes
   bsize:
     size: "{{ storage_test_blkinfo.info[st_pool_pv]['size'] }}"
   register: dev_size
 
+# the difference should be at maximum 1 PE + PE start
 - name: Verify each PV size
   assert:
-    that: (dev_size.bytes - actual_pv_size.stdout | int) |
-      abs / actual_pv_size.stdout | int < 0.04
+    that: (dev_size.bytes - actual_pv_size.stdout | int) <=
+          (4194304 + pv_pe_start.stdout | int)
     msg: >-
-      PV resize failure; size difference too big
+      Unexpected difference between PV size and block device size:
       (device size: {{ dev_size.bytes }})
       (actual PV size: {{ actual_pv_size.stdout }})
 
 - name: Clean up test variables
   set_fact:
     actual_pv_size: null
+    pv_pe_start: null
     dev_size: null