diff --git a/src/main/java/net/minestom/server/command/builder/arguments/Argument.java b/src/main/java/net/minestom/server/command/builder/arguments/Argument.java
index 2dedd03c2..a3e8ffdf5 100644
--- a/src/main/java/net/minestom/server/command/builder/arguments/Argument.java
+++ b/src/main/java/net/minestom/server/command/builder/arguments/Argument.java
@@ -29,7 +29,7 @@ public abstract class Argument<T> {
 
     private T defaultValue;
 
-    public SuggestionCallback suggestionCallback;
+    private SuggestionCallback suggestionCallback;
 
     /**
      * Creates a new argument.
diff --git a/src/main/java/net/minestom/server/command/builder/parser/CommandParser.java b/src/main/java/net/minestom/server/command/builder/parser/CommandParser.java
index df91bbda1..0e014ff5a 100644
--- a/src/main/java/net/minestom/server/command/builder/parser/CommandParser.java
+++ b/src/main/java/net/minestom/server/command/builder/parser/CommandParser.java
@@ -62,7 +62,8 @@ public class CommandParser {
         boolean useRemaining = false;
         // Check the validity of the arguments...
         for (int argIndex = 0; argIndex < commandArguments.length; argIndex++) {
-            ArgumentResult argumentResult = validate(commandArguments, argIndex, inputArguments, inputIndex);
+            final Argument<?> argument = commandArguments[argIndex];
+            ArgumentResult argumentResult = validate(argument, commandArguments, argIndex, inputArguments, inputIndex);
             if (argumentResult == null) {
                 break;
             }
@@ -170,10 +171,11 @@ public class CommandParser {
             ArgumentQueryResult maxArg = null;
             int maxArgIndex = 0;
             for (int argIndex = 0; argIndex < commandArguments.length; argIndex++) {
-                ArgumentResult argumentResult = validate(commandArguments, argIndex, args, inputIndex);
+                Argument<?> argument = commandArguments[argIndex];
+                ArgumentResult argumentResult = validate(argument, commandArguments, argIndex, args, inputIndex);
                 if (argumentResult == null) {
                     argumentResult = new ArgumentResult();
-                    argumentResult.argument = commandArguments[argIndex];
+                    argumentResult.argument = argument;
                     argumentResult.correct = false;
                     argumentResult.inputIndex = inputIndex;
                     argumentResult.rawArg = "";
@@ -182,7 +184,6 @@ public class CommandParser {
                 // Update local var
                 inputIndex = argumentResult.inputIndex;
 
-                final Argument<?> argument = argumentResult.argument;
                 if (argumentResult.correct) {
                     // Fill context
                     context.setArg(argument.getId(), argumentResult.parsedValue, argumentResult.rawArg);
@@ -218,10 +219,9 @@ public class CommandParser {
     }
 
     @Nullable
-    private static ArgumentResult validate(@NotNull Argument<?>[] arguments, int argIndex,
+    private static ArgumentResult validate(@NotNull Argument<?> argument,
+                                           @NotNull Argument<?>[] arguments, int argIndex,
                                            @NotNull String[] inputArguments, int inputIndex) {
-        final Argument<?> argument = arguments[argIndex];
-
         final boolean end = inputIndex == inputArguments.length;
         if (end) // Stop if there is no input to analyze left
             return null;
diff --git a/src/main/java/net/minestom/server/listener/TabCompleteListener.java b/src/main/java/net/minestom/server/listener/TabCompleteListener.java
index e70edddb4..fb580196f 100644
--- a/src/main/java/net/minestom/server/listener/TabCompleteListener.java
+++ b/src/main/java/net/minestom/server/listener/TabCompleteListener.java
@@ -49,7 +49,7 @@ public class TabCompleteListener {
 
             final Argument<?> argument = queryResult.argument;
 
-            final SuggestionCallback suggestionCallback = argument.suggestionCallback;
+            final SuggestionCallback suggestionCallback = argument.getSuggestionCallback();
             if (suggestionCallback != null) {
                 final String input = queryResult.input;
                 final int inputLength = input.length();
diff --git a/src/test/java/demo/commands/TestCommand.java b/src/test/java/demo/commands/TestCommand.java
index 2ae732152..502d8773c 100644
--- a/src/test/java/demo/commands/TestCommand.java
+++ b/src/test/java/demo/commands/TestCommand.java
@@ -1,13 +1,10 @@
 package demo.commands;
 
-import net.minestom.server.chat.ChatColor;
-import net.minestom.server.chat.ColoredText;
 import net.minestom.server.command.CommandSender;
 import net.minestom.server.command.builder.Command;
 import net.minestom.server.command.builder.CommandContext;
 import net.minestom.server.command.builder.suggestion.SuggestionEntry;
 
-import static net.minestom.server.command.builder.arguments.ArgumentType.Integer;
 import static net.minestom.server.command.builder.arguments.ArgumentType.*;
 
 public class TestCommand extends Command {
@@ -16,15 +13,13 @@ public class TestCommand extends Command {
         super("testcmd");
         setDefaultExecutor(this::usage);
 
-        addSubcommand(new Sub());
-
-        var test1 = String("msg").setSuggestionCallback((sender, context, suggestion) -> {
+        var test1 = Word("msg").setSuggestionCallback((sender, context, suggestion) -> {
             suggestion.addEntry(new SuggestionEntry("test"));
         });
 
         addSyntax((sender, context) -> {
-            System.out.println("input: " + context.get("msg"));
-        }, test1);
+            System.out.println("executed");
+        }, Group("test", test1));
 
     }
 
@@ -32,28 +27,4 @@ public class TestCommand extends Command {
         sender.sendMessage("Incorrect usage");
     }
 
-    private static class Sub extends Command {
-
-        public Sub() {
-            super("sub");
-
-            setDefaultExecutor((sender, context) -> sender.sendMessage("default sub"));
-
-            var test1 = Word("msg").setSuggestionCallback((sender, context, suggestion) -> {
-                final String input = suggestion.getInput();
-                if (!input.isEmpty()) {
-                    int num = Integer.valueOf(input) * 2;
-                    suggestion.addEntry(new SuggestionEntry(String.valueOf(num), ColoredText.of(ChatColor.RED, "Hover")));
-                    System.out.println("test: " + context.get("msg3"));
-                }
-            });
-
-            var test3 = Integer("msg3");
-
-            addSyntax((sender, context) -> {
-                System.out.println("input: " + context.getInput());
-            }, test3, test1);
-        }
-    }
-
 }