diff --git a/cluster-autoscaler/processors/provreq/injector.go b/cluster-autoscaler/processors/provreq/injector.go
index 48a2579adb33..9ac7855a5822 100644
--- a/cluster-autoscaler/processors/provreq/injector.go
+++ b/cluster-autoscaler/processors/provreq/injector.go
@@ -25,6 +25,7 @@ import (
 	"k8s.io/autoscaler/cluster-autoscaler/apis/provisioningrequest/autoscaling.x-k8s.io/v1beta1"
 	"k8s.io/autoscaler/cluster-autoscaler/context"
 	"k8s.io/autoscaler/cluster-autoscaler/processors/pods"
+	"k8s.io/autoscaler/cluster-autoscaler/provisioningrequest"
 	provreqconditions "k8s.io/autoscaler/cluster-autoscaler/provisioningrequest/conditions"
 	provreqpods "k8s.io/autoscaler/cluster-autoscaler/provisioningrequest/pods"
 	"k8s.io/autoscaler/cluster-autoscaler/provisioningrequest/provreqclient"
@@ -53,6 +54,10 @@ func (p *ProvisioningRequestPodsInjector) Process(
 		return nil, err
 	}
 	for _, pr := range provReqs {
+		if ok, found := provisioningrequest.SupportedProvisioningClasses[pr.Spec.ProvisioningClassName]; !ok || !found {
+			klog.Warningf("Provisioning Class %s is not supported", pr.Spec.ProvisioningClassName)
+			continue
+		}
 		conditions := pr.Status.Conditions
 		if apimeta.IsStatusConditionTrue(conditions, v1beta1.Failed) || apimeta.IsStatusConditionTrue(conditions, v1beta1.Provisioned) {
 			continue
diff --git a/cluster-autoscaler/processors/provreq/injector_test.go b/cluster-autoscaler/processors/provreq/injector_test.go
index 10069bfd7b27..625b0a7be571 100644
--- a/cluster-autoscaler/processors/provreq/injector_test.go
+++ b/cluster-autoscaler/processors/provreq/injector_test.go
@@ -67,15 +67,16 @@ func TestProvisioningRequestPodsInjector(t *testing.T) {
 	}
 
 	podsA := 10
-	newProvReqA := testProvisioningRequestWithCondition("new", podsA)
-	newAcceptedProvReqA := testProvisioningRequestWithCondition("new-accepted", podsA, accepted)
+	newProvReqA := testProvisioningRequestWithCondition("new", podsA, v1beta1.ProvisioningClassCheckCapacity)
+	newAcceptedProvReqA := testProvisioningRequestWithCondition("new-accepted", podsA, v1beta1.ProvisioningClassCheckCapacity, accepted)
 
 	podsB := 20
-	notProvisionedAcceptedProvReqB := testProvisioningRequestWithCondition("provisioned-false-B", podsB, notProvisioned, accepted)
-	provisionedAcceptedProvReqB := testProvisioningRequestWithCondition("provisioned-and-accepted", podsB, provisioned, accepted)
-	failedProvReq := testProvisioningRequestWithCondition("failed", podsA, failed)
-	notProvisionedRecentlyProvReqB := testProvisioningRequestWithCondition("provisioned-false-recently-B", podsB, notProvisionedRecently)
-	unknownProvisionedProvReqB := testProvisioningRequestWithCondition("provisioned-unknown-B", podsB, unknownProvisioned)
+	notProvisionedAcceptedProvReqB := testProvisioningRequestWithCondition("provisioned-false-B", podsB, v1beta1.ProvisioningClassBestEffortAtomicScaleUp, notProvisioned, accepted)
+	provisionedAcceptedProvReqB := testProvisioningRequestWithCondition("provisioned-and-accepted", podsB, v1beta1.ProvisioningClassBestEffortAtomicScaleUp, provisioned, accepted)
+	failedProvReq := testProvisioningRequestWithCondition("failed", podsA, v1beta1.ProvisioningClassBestEffortAtomicScaleUp, failed)
+	notProvisionedRecentlyProvReqB := testProvisioningRequestWithCondition("provisioned-false-recently-B", podsB, v1beta1.ProvisioningClassBestEffortAtomicScaleUp, notProvisionedRecently)
+	unknownProvisionedProvReqB := testProvisioningRequestWithCondition("provisioned-unknown-B", podsB, v1beta1.ProvisioningClassBestEffortAtomicScaleUp, unknownProvisioned)
+	unknownClass := testProvisioningRequestWithCondition("new-accepted", podsA, "unknown-class", accepted)
 
 	testCases := []struct {
 		name                     string
@@ -109,6 +110,10 @@ func TestProvisioningRequestPodsInjector(t *testing.T) {
 			name:     "Provisioned=Unknown, no pods are injected",
 			provReqs: []*provreqwrapper.ProvisioningRequest{unknownProvisionedProvReqB, failedProvReq, notProvisionedRecentlyProvReqB},
 		},
+		{
+			name:     "ProvisionedClass is unknown, no pods are injected",
+			provReqs: []*provreqwrapper.ProvisioningRequest{unknownClass, failedProvReq},
+		},
 	}
 	for _, tc := range testCases {
 		client := provreqclient.NewFakeProvisioningRequestClient(context.Background(), t, tc.provReqs...)
@@ -132,8 +137,8 @@ func TestProvisioningRequestPodsInjector(t *testing.T) {
 
 }
 
-func testProvisioningRequestWithCondition(name string, podCount int, conditions ...metav1.Condition) *provreqwrapper.ProvisioningRequest {
-	pr := provreqwrapper.BuildTestProvisioningRequest("ns", name, "10", "100", "", int32(podCount), false, time.Now(), "ProvisioningClass")
+func testProvisioningRequestWithCondition(name string, podCount int, class string, conditions ...metav1.Condition) *provreqwrapper.ProvisioningRequest {
+	pr := provreqwrapper.BuildTestProvisioningRequest("ns", name, "10", "100", "", int32(podCount), false, time.Now(), class)
 	pr.Status.Conditions = conditions
 	return pr
 }