diff --git a/pkg/apis/serving/v1beta1/revision_defaults.go b/pkg/apis/serving/v1beta1/revision_defaults.go
index 714a5fc61a91..f13e3b676488 100644
--- a/pkg/apis/serving/v1beta1/revision_defaults.go
+++ b/pkg/apis/serving/v1beta1/revision_defaults.go
@@ -45,51 +45,68 @@ func (rs *RevisionSpec) SetDefaults(ctx context.Context) {
 	}
 
 	for idx := range rs.PodSpec.Containers {
-		if rs.PodSpec.Containers[idx].Name == "" {
-			rs.PodSpec.Containers[idx].Name = cfg.Defaults.UserContainerName(ctx)
+		ctr := &rs.PodSpec.Containers[idx]
+
+		if ctr.Name == "" {
+			ctr.Name = cfg.Defaults.UserContainerName(ctx)
 		}
 
-		if rs.PodSpec.Containers[idx].Resources.Requests == nil {
-			rs.PodSpec.Containers[idx].Resources.Requests = corev1.ResourceList{}
+		if ctr.Resources.Requests == nil {
+			ctr.Resources.Requests = corev1.ResourceList{}
 		}
-		if _, ok := rs.PodSpec.Containers[idx].Resources.Requests[corev1.ResourceCPU]; !ok {
+		if _, ok := ctr.Resources.Requests[corev1.ResourceCPU]; !ok {
 			if rsrc := cfg.Defaults.RevisionCPURequest; rsrc != nil {
-				rs.PodSpec.Containers[idx].Resources.Requests[corev1.ResourceCPU] = *rsrc
+				ctr.Resources.Requests[corev1.ResourceCPU] = *rsrc
 			}
 		}
-		if _, ok := rs.PodSpec.Containers[idx].Resources.Requests[corev1.ResourceMemory]; !ok {
+		if _, ok := ctr.Resources.Requests[corev1.ResourceMemory]; !ok {
 			if rsrc := cfg.Defaults.RevisionMemoryRequest; rsrc != nil {
-				rs.PodSpec.Containers[idx].Resources.Requests[corev1.ResourceMemory] = *rsrc
+				ctr.Resources.Requests[corev1.ResourceMemory] = *rsrc
 			}
 		}
 
-		if rs.PodSpec.Containers[idx].Resources.Limits == nil {
-			rs.PodSpec.Containers[idx].Resources.Limits = corev1.ResourceList{}
+		if ctr.Resources.Limits == nil {
+			ctr.Resources.Limits = corev1.ResourceList{}
 		}
-		if _, ok := rs.PodSpec.Containers[idx].Resources.Limits[corev1.ResourceCPU]; !ok {
+		if _, ok := ctr.Resources.Limits[corev1.ResourceCPU]; !ok {
 			if rsrc := cfg.Defaults.RevisionCPULimit; rsrc != nil {
-				rs.PodSpec.Containers[idx].Resources.Limits[corev1.ResourceCPU] = *rsrc
+				ctr.Resources.Limits[corev1.ResourceCPU] = *rsrc
 			}
 		}
-		if _, ok := rs.PodSpec.Containers[idx].Resources.Limits[corev1.ResourceMemory]; !ok {
+		if _, ok := ctr.Resources.Limits[corev1.ResourceMemory]; !ok {
 			if rsrc := cfg.Defaults.RevisionMemoryLimit; rsrc != nil {
-				rs.PodSpec.Containers[idx].Resources.Limits[corev1.ResourceMemory] = *rsrc
+				ctr.Resources.Limits[corev1.ResourceMemory] = *rsrc
 			}
 		}
-		if rs.PodSpec.Containers[idx].ReadinessProbe == nil {
-			rs.PodSpec.Containers[idx].ReadinessProbe = &corev1.Probe{}
+
+		if ctr.ReadinessProbe == nil {
+			ctr.ReadinessProbe = &corev1.Probe{}
+		}
+		if ctr.ReadinessProbe.TCPSocket == nil &&
+			ctr.ReadinessProbe.HTTPGet == nil &&
+			ctr.ReadinessProbe.Exec == nil {
+			ctr.ReadinessProbe.TCPSocket = &corev1.TCPSocketAction{}
 		}
-		if rs.PodSpec.Containers[idx].ReadinessProbe.TCPSocket == nil &&
-			rs.PodSpec.Containers[idx].ReadinessProbe.HTTPGet == nil &&
-			rs.PodSpec.Containers[idx].ReadinessProbe.Exec == nil {
-			rs.PodSpec.Containers[idx].ReadinessProbe.TCPSocket = &corev1.TCPSocketAction{}
+		if ctr.ReadinessProbe.SuccessThreshold == 0 {
+			ctr.ReadinessProbe.SuccessThreshold = 1
 		}
-
-		if rs.PodSpec.Containers[idx].ReadinessProbe.SuccessThreshold == 0 {
-			rs.PodSpec.Containers[idx].ReadinessProbe.SuccessThreshold = 1
+		// If any of FailureThreshold, TimeoutSeconds or PeriodSeconds are greater than 0,
+		// standard k8s-style would be used so setting normal k8s default values.
+		if ctr.ReadinessProbe.FailureThreshold > 0 ||
+			ctr.ReadinessProbe.TimeoutSeconds > 0 ||
+			ctr.ReadinessProbe.PeriodSeconds > 0 {
+			if ctr.ReadinessProbe.FailureThreshold == 0 {
+				ctr.ReadinessProbe.FailureThreshold = 3
+			}
+			if ctr.ReadinessProbe.TimeoutSeconds == 0 {
+				ctr.ReadinessProbe.TimeoutSeconds = 1
+			}
+			if ctr.ReadinessProbe.PeriodSeconds == 0 {
+				ctr.ReadinessProbe.PeriodSeconds = 10
+			}
 		}
 
-		vms := rs.PodSpec.Containers[idx].VolumeMounts
+		vms := ctr.VolumeMounts
 		for i := range vms {
 			vms[i].ReadOnly = true
 		}
diff --git a/pkg/apis/serving/v1beta1/revision_defaults_test.go b/pkg/apis/serving/v1beta1/revision_defaults_test.go
index d1098d356c59..310eaadbb0c8 100644
--- a/pkg/apis/serving/v1beta1/revision_defaults_test.go
+++ b/pkg/apis/serving/v1beta1/revision_defaults_test.go
@@ -243,6 +243,40 @@ func TestRevisionDefaulting(t *testing.T) {
 				},
 			},
 		},
+	}, {
+		name: "defaulting non aggressive probe",
+		in: &Revision{
+			Spec: RevisionSpec{
+				PodSpec: corev1.PodSpec{
+					Containers: []corev1.Container{{
+						Name: config.DefaultUserContainerName,
+						ReadinessProbe: &corev1.Probe{
+							FailureThreshold: 3,
+						},
+					}},
+				},
+			},
+		},
+		want: &Revision{
+			Spec: RevisionSpec{
+				TimeoutSeconds: ptr.Int64(config.DefaultRevisionTimeoutSeconds),
+				PodSpec: corev1.PodSpec{
+					Containers: []corev1.Container{{
+						Name:      config.DefaultUserContainerName,
+						Resources: defaultResources,
+						ReadinessProbe: &corev1.Probe{
+							TimeoutSeconds:   1,
+							PeriodSeconds:    10,
+							FailureThreshold: 3,
+							SuccessThreshold: 1,
+							Handler: corev1.Handler{
+								TCPSocket: &corev1.TCPSocketAction{},
+							},
+						},
+					}},
+				},
+			},
+		},
 	}}
 
 	for _, test := range tests {