diff --git a/test/Doctests.hs b/test/Doctests.hs
index 847e646d8..9108b2ab0 100644
--- a/test/Doctests.hs
+++ b/test/Doctests.hs
@@ -5,10 +5,12 @@ module Main
 import System.Environment
 import Test.DocTest
 
+defaultFiles = ["src/Data/Abstract/Environment.hs", "src/Data/Range.hs", "src/Data/Semigroup/App.hs"]
+
 main :: IO ()
 main = do
   args <- getArgs
-  doctest (map ("-X" ++) extensions ++ "-isrc" : "--fast" : if null args then ["src"] else args)
+  doctest (map ("-X" ++) extensions ++ "-isrc" : "--fast" : if null args then defaultFiles else args)
 
 extensions :: [String]
 extensions =