diff --git a/common/tests/site/lab0x13/scrow/commands/CommandHandlerTest.java b/common/tests/site/lab0x13/scrow/commands/CommandHandlerTest.java
index e41e2a2..30d0f19 100644
--- a/common/tests/site/lab0x13/scrow/commands/CommandHandlerTest.java
+++ b/common/tests/site/lab0x13/scrow/commands/CommandHandlerTest.java
@@ -13,6 +13,7 @@ import site.lab0x13.scrow.commands.model.literal.RootLiteral;
 
 import java.io.ByteArrayOutputStream;
 import java.io.PrintStream;
+import java.nio.charset.StandardCharsets;
 import java.util.Collections;
 import java.util.stream.Stream;
 
@@ -56,7 +57,7 @@ class CommandHandlerTest {
 
     @BeforeAll
     static void init() {
-        System.setOut(new PrintStream(outContent));
+        System.setOut(new PrintStream(outContent, true, StandardCharsets.UTF_8));
     }
 
     @AfterAll
@@ -72,37 +73,37 @@ class CommandHandlerTest {
     @Test
     void testDefaultExecutor() {
         commandHandler.invoke(rootLiteral, new CommandContextImpl(), Stream.of());
-        assertEquals("default executor\n", outContent.toString());
+        assertEquals("default executor\n", outContent.toString(StandardCharsets.UTF_8));
     }
 
     @Test
     void testSubLiteralNoArgs() {
         commandHandler.invoke(rootLiteral, new CommandContextImpl(), Stream.of("get", "foo"));
-        assertEquals("get executor: player=foo\n", outContent.toString());
+        assertEquals("get executor: player=foo\n", outContent.toString(StandardCharsets.UTF_8));
     }
 
     @Test
     void testSubLiteralWithArgs() {
         commandHandler.invoke(rootLiteral, new CommandContextImpl(), Stream.of("set", "foo", "10"));
-        assertEquals("set executor: player=foo amount=10\n", outContent.toString());
+        assertEquals("set executor: player=foo amount=10\n", outContent.toString(StandardCharsets.UTF_8));
         outContent.reset();
     }
 
     @Test
     void testFailOnBadLiteral() {
         commandHandler.invoke(rootLiteral, new CommandContextImpl(), Stream.of("BAD_LITERAL"));
-        assertEquals("Unknown literal \"BAD_LITERAL\".\n", outContent.toString());
+        assertEquals("Unknown literal \"BAD_LITERAL\".\n", outContent.toString(StandardCharsets.UTF_8));
     }
 
     @Test
     void testFailOnBadArgument() {
         commandHandler.invoke(rootLiteral, new CommandContextImpl(), Stream.of("set", "foo", "bar"));
-        assertEquals("Not a number.\n", outContent.toString());
+        assertEquals("Not a number.\n", outContent.toString(StandardCharsets.UTF_8));
     }
 
     @Test
     void testFailOnMissingArgument() {
         commandHandler.invoke(rootLiteral, new CommandContextImpl(), Stream.of("set"));
-        assertEquals("Argument expected.\n", outContent.toString());
+        assertEquals("Argument expected.\n", outContent.toString(StandardCharsets.UTF_8));
     }
 }
diff --git a/common/tests/site/lab0x13/scrow/commands/TestPlatform.java b/common/tests/site/lab0x13/scrow/commands/TestPlatform.java
index 0fc7ebf..a9088a8 100644
--- a/common/tests/site/lab0x13/scrow/commands/TestPlatform.java
+++ b/common/tests/site/lab0x13/scrow/commands/TestPlatform.java
@@ -3,6 +3,7 @@ package site.lab0x13.scrow.commands;
 import net.kyori.adventure.text.Component;
 import net.kyori.adventure.text.serializer.plain.PlainTextComponentSerializer;
 
+import java.util.ArrayList;
 import java.util.List;
 
 public class TestPlatform implements PlatformAdapter<CommandContextImpl> {
@@ -12,7 +13,7 @@ public class TestPlatform implements PlatformAdapter<CommandContextImpl> {
     private final List<String> permissions;
 
     public TestPlatform(List<String> permissions) {
-        this.permissions = permissions;
+        this.permissions = new ArrayList<>(permissions);
     }
 
     @Override
@@ -23,5 +24,6 @@ public class TestPlatform implements PlatformAdapter<CommandContextImpl> {
     @Override
     public void sendMessage(CommandContextImpl ctx, Component message) {
         System.out.println(plainText.serialize(message));
+        System.out.flush();
     }
 }