diff --git a/src/test/java/dan200/computercraft/core/ComputerTestDelegate.java b/src/test/java/dan200/computercraft/core/ComputerTestDelegate.java
index 301b1c9a8..f2d2453a7 100644
--- a/src/test/java/dan200/computercraft/core/ComputerTestDelegate.java
+++ b/src/test/java/dan200/computercraft/core/ComputerTestDelegate.java
@@ -333,6 +333,7 @@ public void after() throws InterruptedException, IOException
 
         if( finishedWith != null )
         {
+            REPORT_PATH.getParentFile().mkdirs();
             try( BufferedWriter writer = Files.newBufferedWriter( REPORT_PATH.toPath() ) )
             {
                 new LuaCoverage( finishedWith ).write( writer );