diff --git a/core/modules/simpletest/files/README.txt b/core/modules/simpletest/files/README.txt
index c8f39ad3377fe1f49f3f061ec8672511b85a5298..d668f6d79732ebddf3ddfd5409a08238a0c8a588 100644
--- a/core/modules/simpletest/files/README.txt
+++ b/core/modules/simpletest/files/README.txt
@@ -1,4 +1,5 @@
 
-These files are use in some tests that upload files or other operations were
-a file is useful. These files are copied to the files directory as specified
-in the site settings. Other tests files are generated in order to save space.
+These files are useful in tests that upload files or otherwise need to
+manipulate files, in which case they are copied to the files directory as
+specified in the site settings. Dummy files can also be generated by tests in
+order to save space.