diff --git a/test/functional/api/cas/cli_messages.py b/test/functional/api/cas/cli_messages.py
index 665fa81..b5c8f10 100644
--- a/test/functional/api/cas/cli_messages.py
+++ b/test/functional/api/cas/cli_messages.py
@@ -82,7 +82,8 @@ remove_mounted_core = [
 ]
 
 stop_cache_mounted_core = [
-    r"Can\'t stop cache instance \d+\. Device /dev/cas\d+-\d+ is mounted\!"
+    r"Error while removing cache \d+",
+    r"Device opens or mount are pending to this cache"
 ]
 
 load_and_force = [
diff --git a/test/functional/tests/fault_injection/test_fault_injection_interrupts.py b/test/functional/tests/fault_injection/test_fault_injection_interrupts.py
index 53f7594..c45fb20 100644
--- a/test/functional/tests/fault_injection/test_fault_injection_interrupts.py
+++ b/test/functional/tests/fault_injection/test_fault_injection_interrupts.py
@@ -240,7 +240,7 @@ def test_interrupt_core_remove(cache_mode, filesystem):
             wait_for_flushing(cache, core)
             percentage = casadm_parser.get_flushing_progress(cache.cache_id, core.core_id)
             while percentage < 50:
-                percentage = casadm_parser.get_flushing_progress(cache.cache_i, core.core_id)
+                percentage = casadm_parser.get_flushing_progress(cache.cache_id, core.core_id)
             TestRun.executor.run(f"kill -s SIGINT {flush_pid}")
 
         with TestRun.step(