diff --git a/profiles/realtime-virtual-guest/tuned.conf b/profiles/realtime-virtual-guest/tuned.conf
index 95dbfd6..cab6553 100644
--- a/profiles/realtime-virtual-guest/tuned.conf
+++ b/profiles/realtime-virtual-guest/tuned.conf
@@ -13,7 +13,7 @@ isolated_cores_expanded=${f:cpulist_unpack:${isolated_cores}}
 isolated_cores_present_expanded=${f:cpulist_present:${isolated_cores}}
 
 # Fail if isolated_cores contains CPUs which are not present
-assert=${f:assertion:non present CPU(s) in isolated_cores:${isolated_cores_expanded}:${isolated_cores_present_expanded}}
+assert=${f:assertion:isolated_cores contains present CPU(s):${isolated_cores_expanded}:${isolated_cores_present_expanded}}
 
 [script]
 script=script.sh
diff --git a/profiles/realtime-virtual-host/tuned.conf b/profiles/realtime-virtual-host/tuned.conf
index 049f208..92a7ee0 100644
--- a/profiles/realtime-virtual-host/tuned.conf
+++ b/profiles/realtime-virtual-host/tuned.conf
@@ -30,7 +30,7 @@ isolated_cores_expanded=${f:cpulist_unpack:${isolated_cores}}
 isolated_cores_present_expanded=${f:cpulist_present:${isolated_cores}}
 
 # Fail if isolated_cores contains CPUs which are not present
-assert=${f:assertion:non present CPU(s) in isolated_cores:${isolated_cores_expanded}:${isolated_cores_present_expanded}}
+assert=${f:assertion:isolated_cores contains present CPU(s):${isolated_cores_expanded}:${isolated_cores_present_expanded}}
 
 [scheduler]
 # group.group_name=rule_priority:scheduler_policy:scheduler_priority:core_affinity_in_hex:process_name_regex
diff --git a/profiles/realtime/tuned.conf b/profiles/realtime/tuned.conf
index e81feaa..6d4f7c7 100644
--- a/profiles/realtime/tuned.conf
+++ b/profiles/realtime/tuned.conf
@@ -16,7 +16,7 @@ isolated_cores_expanded=${f:cpulist_unpack:${isolated_cores}}
 isolated_cores_present_expanded=${f:cpulist_present:${isolated_cores}}
 
 # Fail if isolated_cores contains CPUs which are not present
-assert=${f:assertion:non present CPU(s) in isolated_cores:${isolated_cores_expanded}:${isolated_cores_present_expanded}}
+assert=${f:assertion:isolated_cores contains present CPU(s):${isolated_cores_expanded}:${isolated_cores_present_expanded}}
 
 [sysctl]
 kernel.hung_task_timeout_secs = 600