diff --git a/test/e2e/cluster_size_autoscaling.go b/test/e2e/cluster_size_autoscaling.go
index 30718171a5..23bea8f21d 100644
--- a/test/e2e/cluster_size_autoscaling.go
+++ b/test/e2e/cluster_size_autoscaling.go
@@ -112,7 +112,7 @@ var _ = framework.KubeDescribe("Cluster size autoscaling [Slow]", func() {
 
 	It("shouldn't increase cluster size if pending pod is too large [Feature:ClusterSizeAutoscalingScaleUp]", func() {
 		By("Creating unschedulable pod")
-		ReserveMemory(f, "memory-reservation", 1, memCapacityMb, false)
+		ReserveMemory(f, "memory-reservation", 1, int(1.1*float64(memCapacityMb)), false)
 		defer framework.DeleteRCAndPods(f.ClientSet, f.InternalClientset, f.Namespace.Name, "memory-reservation")
 
 		By("Waiting for scale up hoping it won't happen")
@@ -281,7 +281,7 @@ var _ = framework.KubeDescribe("Cluster size autoscaling [Slow]", func() {
 		framework.ExpectNoError(enableAutoscaler(extraPoolName, 1, 2))
 
 		By("Creating rc with 2 pods too big to fit default-pool but fitting extra-pool")
-		ReserveMemory(f, "memory-reservation", 2, 2*memCapacityMb, false)
+		ReserveMemory(f, "memory-reservation", 2, int(2.1*float64(memCapacityMb)), false)
 		defer framework.DeleteRCAndPods(f.ClientSet, f.InternalClientset, f.Namespace.Name, "memory-reservation")
 
 		// Apparently GKE master is restarted couple minutes after the node pool is added