diff --git a/testing/install_script.sh b/testing/install_script.sh
index f590768..3e55812 100644
--- a/testing/install_script.sh
+++ b/testing/install_script.sh
@@ -165,9 +165,11 @@ elif [ $MC_TYPE = "forge" ]; then
 			java -jar forge-$MC_VERSION-$FORGE_VERSION-installer.jar --installServer
 			mv -v run.sh run-$MC_TYPE-$MC_VERSION.sh
 			chmod +x run-$MC_TYPE-$MC_VERSION.sh
-			echo '-Xmx$XMX_SIZE' > user_jvm_args.txt
-			echo '-Xms$XMS_SIZE' > user_jvm_args.txt
-			echo '-Xmn$XMN_SIZE' > user_jvm_args.txt
+			tee user_jvm_args.txt <<-EOF
+			-Xmx${XMX_SIZE}
+			-Xms${XMS_SIZE}
+			-Xmn${XMN_SIZE}
+			EOF
 			cd ..
 	fi
 
@@ -193,9 +195,11 @@ elif [ $MC_TYPE = "neoforged" ]; then
 			java -jar neoforge-$NEOFORGED_VERSION-installer.jar --installServer
 			mv -v run.sh run-$MC_TYPE-$MC_VERSION.sh
 			chmod +x run-$MC_TYPE-$MC_VERSION.sh
-			echo '-Xmx$XMX_SIZE' > user_jvm_args.txt
-			echo '-Xms$XMS_SIZE' > user_jvm_args.txt
-			echo '-Xmn$XMN_SIZE' > user_jvm_args.txt
+			tee user_jvm_args.txt <<-EOF
+			-Xmx${XMX_SIZE}
+			-Xms${XMS_SIZE}
+			-Xmn${XMN_SIZE}
+			EOF
 			cd ..
 	fi