diff --git a/examples/PoolBox/assets/Makefile b/examples/PoolBox/assets/Makefile
index c93cc47b..3456f708 100644
--- a/examples/PoolBox/assets/Makefile
+++ b/examples/PoolBox/assets/Makefile
@@ -40,7 +40,7 @@ $(OUTPUT_DIR)/fox.xa: audio/temp/fox.wav
 
 $(OUTPUT_DIR)/%.vag: audio/temp/%.wav
 	@mkdir -p $(OUTPUT_DIR)
-	jaby_engine_fconv $< -o $@ vag
+	jaby_engine_fconv --lz4 $< -o $@ vag
 
 $(OUTPUT_DIR)/%.xa: audio/%.wav
 	@mkdir -p $(OUTPUT_DIR)
diff --git a/examples/PoolBox/iso/Config.xml b/examples/PoolBox/iso/Config.xml
index 10858289..b6a4ac15 100644
--- a/examples/PoolBox/iso/Config.xml
+++ b/examples/PoolBox/iso/Config.xml
@@ -49,8 +49,8 @@
         </Directory>
         <Directory name = "SFX" hidden = "true">
             <!--TODO: test lz4 version-->
-            <File name = "APPLE.VAG" lz4 = "none">../assets/bin/apple.vag</File>
-            <File name = "BLUBB.VAG" lz4 = "none">../assets/bin/blubb.vag</File>
+            <File name = "APPLE.VAG" lz4 = "already">../assets/bin/apple.vag</File><!--14032-->
+            <File name = "BLUBB.VAG" lz4 = "already">../assets/bin/blubb.vag</File>
         </Directory>
     </Filesystem>
     <AudioTrack align = "true">../assets/audio/temp/breaking.wav</AudioTrack>
diff --git a/src/Library/src/BootLoader/start_boot.cpp b/src/Library/src/BootLoader/start_boot.cpp
index 177250bd..e996258c 100644
--- a/src/Library/src/BootLoader/start_boot.cpp
+++ b/src/Library/src/BootLoader/start_boot.cpp
@@ -58,8 +58,6 @@ namespace JabyEngine {
         simple_assert(1, SPU_MMU::allocate(1, 0x800), calculate_spu_adr(0x600));
         simple_assert(2, SPU_MMU::allocate(0, 0x300), calculate_spu_adr(0x0));
         simple_assert(3, SPU_MMU::allocate(2, 0x300), calculate_spu_adr(0x300));
-
-        // TODO: More tests
     }
 
     namespace boot {
diff --git a/src/Tools/jaby_engine_fconv/src/main.rs b/src/Tools/jaby_engine_fconv/src/main.rs
index e96f4413..23e43e01 100644
--- a/src/Tools/jaby_engine_fconv/src/main.rs
+++ b/src/Tools/jaby_engine_fconv/src/main.rs
@@ -1,7 +1,7 @@
 use clap::{Parser, Subcommand};
 use jaby_engine_fconv::{audio::*, images::*, nothing};
 use std::path::PathBuf;
-use tool_helper::{Error, exit_with_error};
+use tool_helper::{exit_with_error, print_warning, Error};
 
 #[derive(Parser)]
 #[clap(about = "Converts files to various JabyEngine related file formats", long_about = None)]
@@ -89,6 +89,10 @@ fn run_external_conversion(cmd: CommandLine) -> Result<(), Error> {
     let input_file  = cmd.input_file.ok_or(Error::from_str("Input has to be a file"))?;
     let output_file = cmd.output_file.ok_or(Error::from_str("Output has to be a file"))?;
 
+    if cmd.compress_lz4 {
+        print_warning("LZ4 compression not supported for external commands".to_owned());
+    }
+
     match cmd.sub_command {
         SubCommands::VAG(args) => vag::convert(args, input_file, output_file),
         SubCommands::XA(args)  => xa::convert(args, input_file, output_file),