diff --git a/test/file-organization.org b/test/file-organization.org
index 4d76c0068e3..6c93c28c8e1 100644
--- a/test/file-organization.org
+++ b/test/file-organization.org
@@ -30,7 +30,7 @@ the directory structure of the source tree; so tests for files in the
 
 Tests should normally reside in a file with ~-tests.el~ added to the
 base-name of the tested source file; hence ~ert.el~ is tested in
-~ert-tests.el~, and ~pcase.el~ is tested in ~pcase-tests.el~.  As n
+~ert-tests.el~, and ~pcase.el~ is tested in ~pcase-tests.el~.  As an
 exception, tests for a single feature may be placed into multiple
 files of any name which are themselves placed in a directory named
 after the feature with ~-tests~ appended, such as