diff --git a/cluster/defaults.go b/cluster/defaults.go
index 4e1f159e..caef90cf 100644
--- a/cluster/defaults.go
+++ b/cluster/defaults.go
@@ -1116,7 +1116,7 @@ func (c *Cluster) setCloudProvider() error {
 				return fmt.Errorf("failed to parse semver range for checking cloud provider %v", err)
 			}
 			if defaultExternalAwsRange(clusterVersion) {
-				return fmt.Errorf(fmt.Sprintf("Cloud provider %s is invalid for [%s]", aws.AWSCloudProviderName, c.Version))
+				return fmt.Errorf("Cloud provider %s is invalid for [%s]", aws.AWSCloudProviderName, c.Version)
 			}
 		}
 	}
diff --git a/cluster/hosts.go b/cluster/hosts.go
index a98bcd35..126a1e1c 100644
--- a/cluster/hosts.go
+++ b/cluster/hosts.go
@@ -89,7 +89,7 @@ func (c *Cluster) InvertIndexHosts() error {
 			newHost.BastionHost = c.BastionHost
 		}
 		for _, role := range host.Role {
-			logrus.Debugf("Host: " + host.Address + " has role: " + role)
+			logrus.Debugf("Host: %s has role: %s", host.Address, role)
 			switch role {
 			case services.ETCDRole:
 				newHost.IsEtcd = true
diff --git a/cmd/up.go b/cmd/up.go
index 731ee6d5..da9c188d 100644
--- a/cmd/up.go
+++ b/cmd/up.go
@@ -259,7 +259,7 @@ func ClusterUp(ctx context.Context, dialersOptions hosts.DialersOptions, flags c
 	}
 
 	if errMsgMaxUnavailableNotFailedCtrl != "" || errMsgMaxUnavailableNotFailedWrkr != "" {
-		return APIURL, caCrt, clientCert, clientKey, nil, fmt.Errorf(errMsgMaxUnavailableNotFailedCtrl + errMsgMaxUnavailableNotFailedWrkr)
+		return APIURL, caCrt, clientCert, clientKey, nil, fmt.Errorf("%s%s", errMsgMaxUnavailableNotFailedCtrl, errMsgMaxUnavailableNotFailedWrkr)
 	}
 	log.Infof(ctx, "Finished building Kubernetes cluster successfully")
 	return APIURL, caCrt, clientCert, clientKey, kubeCluster.Certificates, nil
diff --git a/util/ecr.go b/util/ecr.go
index b02c48ee..ef84d314 100644
--- a/util/ecr.go
+++ b/util/ecr.go
@@ -36,7 +36,7 @@ func ECRCredentialPlugin(plugin *v3.ECRCredentialPlugin, pr string) (authConfig
 	if len(matches) == 0 {
 		return authConfig, fmt.Errorf("Not a valid ECR registry")
 	} else if len(matches) < 3 {
-		return authConfig, fmt.Errorf(pr + "is not a valid repository URI for Amazon Elastic Container Registry.")
+		return authConfig, fmt.Errorf("%s is not a valid repository URI for Amazon Elastic Container Registry", pr)
 	}
 
 	config := &aws.Config{