diff --git a/cloud/shepherd/manager/initializer.go b/cloud/shepherd/manager/initializer.go
index 2c04c43..a380a8f 100644
--- a/cloud/shepherd/manager/initializer.go
+++ b/cloud/shepherd/manager/initializer.go
@@ -263,10 +263,10 @@
 		return nil, fmt.Errorf("agent returned unknown result of type %T", arsp.Result)
 	}
 	if !proto.Equal(&imsg, successResp.InitMessage) {
-		return nil, fmt.Errorf("agent did not send back the init message.")
+		return nil, fmt.Errorf("agent did not send back the init message")
 	}
 	if len(successResp.Key) != ed25519.PublicKeySize {
-		return nil, fmt.Errorf("agent key length mismatch.")
+		return nil, fmt.Errorf("agent key length mismatch")
 	}
 	klog.Infof("Started the agent (machine ID: %s, key: %s).", mid, hex.EncodeToString(successResp.Key))
 	return successResp.Key, nil