diff --git a/tests/test_project.py b/tests/test_project.py
index 9ee14615..1ec42348 100644
--- a/tests/test_project.py
+++ b/tests/test_project.py
@@ -612,6 +612,8 @@ def testOldProject(nwDummy, nwOldProj):
     mkdir(path.join(nwOldProj, "stuff"))
     mkdir(path.join(nwOldProj, "data_1", "stuff"))
 
+    # Create dummy files
+    mkdir(path.join(nwOldProj, "cache"))
     for aFile in deleteFiles:
         with open(aFile, mode="w+", encoding="utf8") as outFile:
             outFile.write("Hi")