diff --git a/pkg/apis/apps/validation/validation.go b/pkg/apis/apps/validation/validation.go
index d2eabd5c6da..8072c953a1d 100644
--- a/pkg/apis/apps/validation/validation.go
+++ b/pkg/apis/apps/validation/validation.go
@@ -108,7 +108,7 @@ func ValidateStatefulSetSpec(spec *apps.StatefulSetSpec, fldPath *field.Path) fi
 	} else {
 		allErrs = append(allErrs, unversionedvalidation.ValidateLabelSelector(spec.Selector, fldPath.Child("selector"))...)
 		if len(spec.Selector.MatchLabels)+len(spec.Selector.MatchExpressions) == 0 {
-			allErrs = append(allErrs, field.Invalid(fldPath.Child("selector"), spec.Selector, "empty selector is not valid for statefulset."))
+			allErrs = append(allErrs, field.Invalid(fldPath.Child("selector"), spec.Selector, "empty selector is invalid for statefulset"))
 		}
 	}
 
@@ -150,7 +150,7 @@ func ValidateStatefulSetUpdate(statefulSet, oldStatefulSet *apps.StatefulSet) fi
 	statefulSet.Spec.UpdateStrategy = oldStatefulSet.Spec.UpdateStrategy
 
 	if !apiequality.Semantic.DeepEqual(statefulSet.Spec, oldStatefulSet.Spec) {
-		allErrs = append(allErrs, field.Forbidden(field.NewPath("spec"), "updates to statefulset spec for fields other than 'replicas', 'template', and 'updateStrategy' are forbidden."))
+		allErrs = append(allErrs, field.Forbidden(field.NewPath("spec"), "updates to statefulset spec for fields other than 'replicas', 'template', and 'updateStrategy' are forbidden"))
 	}
 	statefulSet.Spec.Replicas = restoreReplicas
 	statefulSet.Spec.Template = restoreTemplate
diff --git a/pkg/apis/core/helper/helpers.go b/pkg/apis/core/helper/helpers.go
index 7be34a8578b..486122298c2 100644
--- a/pkg/apis/core/helper/helpers.go
+++ b/pkg/apis/core/helper/helpers.go
@@ -56,7 +56,7 @@ func HugePageResourceName(pageSize resource.Quantity) core.ResourceName {
 // an error is returned.
 func HugePageSizeFromResourceName(name core.ResourceName) (resource.Quantity, error) {
 	if !IsHugePageResourceName(name) {
-		return resource.Quantity{}, fmt.Errorf("resource name: %s is not valid hugepage name", name)
+		return resource.Quantity{}, fmt.Errorf("resource name: %s is an invalid hugepage name", name)
 	}
 	pageSize := strings.TrimPrefix(string(name), core.ResourceHugePagesPrefix)
 	return resource.ParseQuantity(pageSize)
diff --git a/pkg/apis/core/v1/helper/helpers.go b/pkg/apis/core/v1/helper/helpers.go
index 4b1da9d9204..bf6c001b780 100644
--- a/pkg/apis/core/v1/helper/helpers.go
+++ b/pkg/apis/core/v1/helper/helpers.go
@@ -79,7 +79,7 @@ func HugePageResourceName(pageSize resource.Quantity) v1.ResourceName {
 // an error is returned.
 func HugePageSizeFromResourceName(name v1.ResourceName) (resource.Quantity, error) {
 	if !IsHugePageResourceName(name) {
-		return resource.Quantity{}, fmt.Errorf("resource name: %s is not valid hugepage name", name)
+		return resource.Quantity{}, fmt.Errorf("resource name: %s is an invalid hugepage name", name)
 	}
 	pageSize := strings.TrimPrefix(string(name), v1.ResourceHugePagesPrefix)
 	return resource.ParseQuantity(pageSize)
diff --git a/pkg/apis/extensions/validation/validation.go b/pkg/apis/extensions/validation/validation.go
index 3f0d37470a6..f53abdf68a0 100644
--- a/pkg/apis/extensions/validation/validation.go
+++ b/pkg/apis/extensions/validation/validation.go
@@ -110,7 +110,7 @@ func ValidateDaemonSetSpec(spec *extensions.DaemonSetSpec, fldPath *field.Path)
 		allErrs = append(allErrs, field.Invalid(fldPath.Child("template", "metadata", "labels"), spec.Template.Labels, "`selector` does not match template `labels`"))
 	}
 	if spec.Selector != nil && len(spec.Selector.MatchLabels)+len(spec.Selector.MatchExpressions) == 0 {
-		allErrs = append(allErrs, field.Invalid(fldPath.Child("selector"), spec.Selector, "empty selector is not valid for daemonset."))
+		allErrs = append(allErrs, field.Invalid(fldPath.Child("selector"), spec.Selector, "empty selector is invalid for daemonset"))
 	}
 
 	allErrs = append(allErrs, apivalidation.ValidatePodTemplateSpec(&spec.Template, fldPath.Child("template"))...)
@@ -267,13 +267,13 @@ func ValidateDeploymentSpec(spec *extensions.DeploymentSpec, fldPath *field.Path
 	} else {
 		allErrs = append(allErrs, unversionedvalidation.ValidateLabelSelector(spec.Selector, fldPath.Child("selector"))...)
 		if len(spec.Selector.MatchLabels)+len(spec.Selector.MatchExpressions) == 0 {
-			allErrs = append(allErrs, field.Invalid(fldPath.Child("selector"), spec.Selector, "empty selector is not valid for deployment."))
+			allErrs = append(allErrs, field.Invalid(fldPath.Child("selector"), spec.Selector, "empty selector is invalid for deployment"))
 		}
 	}
 
 	selector, err := metav1.LabelSelectorAsSelector(spec.Selector)
 	if err != nil {
-		allErrs = append(allErrs, field.Invalid(fldPath.Child("selector"), spec.Selector, "invalid label selector."))
+		allErrs = append(allErrs, field.Invalid(fldPath.Child("selector"), spec.Selector, "invalid label selector"))
 	} else {
 		allErrs = append(allErrs, ValidatePodTemplateSpecForReplicaSet(&spec.Template, selector, spec.Replicas, fldPath.Child("template"))...)
 	}
@@ -290,7 +290,7 @@ func ValidateDeploymentSpec(spec *extensions.DeploymentSpec, fldPath *field.Path
 	if spec.ProgressDeadlineSeconds != nil {
 		allErrs = append(allErrs, apivalidation.ValidateNonnegativeField(int64(*spec.ProgressDeadlineSeconds), fldPath.Child("progressDeadlineSeconds"))...)
 		if *spec.ProgressDeadlineSeconds <= spec.MinReadySeconds {
-			allErrs = append(allErrs, field.Invalid(fldPath.Child("progressDeadlineSeconds"), spec.ProgressDeadlineSeconds, "must be greater than minReadySeconds."))
+			allErrs = append(allErrs, field.Invalid(fldPath.Child("progressDeadlineSeconds"), spec.ProgressDeadlineSeconds, "must be greater than minReadySeconds"))
 		}
 	}
 	return allErrs
@@ -566,13 +566,13 @@ func ValidateReplicaSetSpec(spec *extensions.ReplicaSetSpec, fldPath *field.Path
 	} else {
 		allErrs = append(allErrs, unversionedvalidation.ValidateLabelSelector(spec.Selector, fldPath.Child("selector"))...)
 		if len(spec.Selector.MatchLabels)+len(spec.Selector.MatchExpressions) == 0 {
-			allErrs = append(allErrs, field.Invalid(fldPath.Child("selector"), spec.Selector, "empty selector is not valid for deployment."))
+			allErrs = append(allErrs, field.Invalid(fldPath.Child("selector"), spec.Selector, "empty selector is invalid for deployment"))
 		}
 	}
 
 	selector, err := metav1.LabelSelectorAsSelector(spec.Selector)
 	if err != nil {
-		allErrs = append(allErrs, field.Invalid(fldPath.Child("selector"), spec.Selector, "invalid label selector."))
+		allErrs = append(allErrs, field.Invalid(fldPath.Child("selector"), spec.Selector, "invalid label selector"))
 	} else {
 		allErrs = append(allErrs, ValidatePodTemplateSpecForReplicaSet(&spec.Template, selector, spec.Replicas, fldPath.Child("template"))...)
 	}