diff --git a/data.spec.lua b/data.spec.lua
index 0675ebb..f45420a 100644
--- a/data.spec.lua
+++ b/data.spec.lua
@@ -15,11 +15,10 @@ mtt.register("data", function(callback)
     assert(value.y == 1)
 
     assert(not mapsync.load_data("y"))
-    
+
     -- data file
-    assert(mapsync.get_data_file("myfile.txt")) -- defaults to read-mode
+    assert(not mapsync.get_data_file("non-existent-file.txt")) -- defaults to read-mode
     assert(mapsync.get_data_file("myfile2.txt", "w"))
-    assert(not mapsync.get_data_file("myfile-non-existent-file.txt", "r"))
 
     -- write to data file
     assert(not mapsync.get_data_file("myfile3.txt"))