diff --git a/pkg/registry/resource/resourceclaim/declarative_validation_test.go b/pkg/registry/resource/resourceclaim/declarative_validation_test.go
index 941831e1111..eb736af2496 100644
--- a/pkg/registry/resource/resourceclaim/declarative_validation_test.go
+++ b/pkg/registry/resource/resourceclaim/declarative_validation_test.go
@@ -138,6 +138,12 @@ func testDeclarativeValidate(t *testing.T, apiVersion string) {
 				field.TooMany(field.NewPath("spec", "devices", "config").Index(0).Child("requests"), 33, 32).WithOrigin("maxItems"),
 			},
 		},
+		"invalid constraint requests, duplicate name": {
+			input: mkValidResourceClaim(tweakDuplicateConstraintRequest("req-0")),
+			expectedErrs: field.ErrorList{
+				field.Duplicate(field.NewPath("spec", "devices", "constraints").Index(0).Child("requests").Index(1), "req-0"),
+			},
+		},
 		"valid firstAvailable, max allowed": {
 			input: mkValidResourceClaim(tweakFirstAvailable(8)),
 		},
@@ -306,6 +312,15 @@ func tweakConfigRequests(count int) func(*resource.ResourceClaim) {
 	}
 }
 
+func tweakDuplicateConstraintRequest(name string) func(*resource.ResourceClaim) {
+	return func(rc *resource.ResourceClaim) {
+		if len(rc.Spec.Devices.Constraints) == 0 {
+			rc.Spec.Devices.Constraints = append(rc.Spec.Devices.Constraints, mkDeviceConstraint())
+		}
+		rc.Spec.Devices.Constraints[0].Requests = append(rc.Spec.Devices.Constraints[0].Requests, name)
+	}
+}
+
 func tweakFirstAvailable(items int) func(*resource.ResourceClaim) {
 	return func(rc *resource.ResourceClaim) {
 		rc.Spec.Devices.Requests[0].Exactly = nil