diff --git a/cmd/kubeadm/app/util/system/package_validator.go b/cmd/kubeadm/app/util/system/package_validator.go
index 820c68e6c2..764ec5b8b5 100644
--- a/cmd/kubeadm/app/util/system/package_validator.go
+++ b/cmd/kubeadm/app/util/system/package_validator.go
@@ -65,7 +65,7 @@ func newDPKG() (packageManager, bool) {
 
 // getPackageVersion returns the upstream package version for the package given
 // the packageName, and an error if no such package exists.
-func (_ dpkg) getPackageVersion(packageName string) (string, error) {
+func (dpkg) getPackageVersion(packageName string) (string, error) {
 	output, err := exec.Command("dpkg-query", "--show", "--showformat='${Version}'", packageName).Output()
 	if err != nil {
 		return "", pkgerrors.Wrap(err, "dpkg-query failed")
@@ -86,23 +86,23 @@ type packageValidator struct {
 }
 
 // Name returns the name of the package validator.
-func (self *packageValidator) Name() string {
+func (validator *packageValidator) Name() string {
 	return "package"
 }
 
 // Validate checks packages and their versions against the spec using the
 // package manager on the running machine, and returns an error on any
 // package/version mismatch.
-func (self *packageValidator) Validate(spec SysSpec) (error, error) {
+func (validator *packageValidator) Validate(spec SysSpec) (error, error) {
 	if len(spec.PackageSpecs) == 0 {
 		return nil, nil
 	}
 
 	var err error
-	if self.kernelRelease, err = getKernelRelease(); err != nil {
+	if validator.kernelRelease, err = getKernelRelease(); err != nil {
 		return nil, err
 	}
-	if self.osDistro, err = getOSDistro(); err != nil {
+	if validator.osDistro, err = getOSDistro(); err != nil {
 		return nil, err
 	}
 
@@ -110,17 +110,17 @@ func (self *packageValidator) Validate(spec SysSpec) (error, error) {
 	if err != nil {
 		return nil, err
 	}
-	specs := applyPackageSpecOverride(spec.PackageSpecs, spec.PackageSpecOverrides, self.osDistro)
-	return self.validate(specs, manager)
+	specs := applyPackageSpecOverride(spec.PackageSpecs, spec.PackageSpecOverrides, validator.osDistro)
+	return validator.validate(specs, manager)
 }
 
 // Validate checks packages and their versions against the packageSpecs using
 // the packageManager, and returns an error on any package/version mismatch.
-func (self *packageValidator) validate(packageSpecs []PackageSpec, manager packageManager) (error, error) {
+func (validator *packageValidator) validate(packageSpecs []PackageSpec, manager packageManager) (error, error) {
 	var errs []error
 	for _, spec := range packageSpecs {
 		// Substitute variables in package name.
-		packageName := resolvePackageName(spec.Name, self.kernelRelease)
+		packageName := resolvePackageName(spec.Name, validator.kernelRelease)
 
 		nameWithVerRange := fmt.Sprintf("%s (%s)", packageName, spec.VersionRange)
 
@@ -129,14 +129,14 @@ func (self *packageValidator) validate(packageSpecs []PackageSpec, manager packa
 		if err != nil {
 			klog.V(1).Infof("Failed to get the version for the package %q: %s\n", packageName, err)
 			errs = append(errs, err)
-			self.reporter.Report(nameWithVerRange, "not installed", bad)
+			validator.reporter.Report(nameWithVerRange, "not installed", bad)
 			continue
 		}
 
 		// Version requirement will not be enforced if version range is
 		// not specified in the spec.
 		if spec.VersionRange == "" {
-			self.reporter.Report(packageName, version, good)
+			validator.reporter.Report(packageName, version, good)
 			continue
 		}
 
@@ -147,15 +147,15 @@ func (self *packageValidator) validate(packageSpecs []PackageSpec, manager packa
 		if err != nil {
 			klog.Errorf("Failed to convert %q to semantic version: %s\n", version, err)
 			errs = append(errs, err)
-			self.reporter.Report(nameWithVerRange, "internal error", bad)
+			validator.reporter.Report(nameWithVerRange, "internal error", bad)
 			continue
 		}
 		versionRange := semver.MustParseRange(toSemVerRange(spec.VersionRange))
 		if versionRange(sv) {
-			self.reporter.Report(nameWithVerRange, version, good)
+			validator.reporter.Report(nameWithVerRange, version, good)
 		} else {
 			errs = append(errs, pkgerrors.Errorf("package \"%s %s\" does not meet the spec \"%s (%s)\"", packageName, sv, packageName, spec.VersionRange))
-			self.reporter.Report(nameWithVerRange, version, bad)
+			validator.reporter.Report(nameWithVerRange, version, bad)
 		}
 	}
 	return nil, errors.NewAggregate(errs)