diff --git a/md-to-html.cabal b/md-to-html.cabal
index f12a362..2916d90 100644
--- a/md-to-html.cabal
+++ b/md-to-html.cabal
@@ -56,6 +56,7 @@ common warnings
 library
    hs-source-dirs:   src
    exposed-modules: MdToHTML
+   other-modules: MdToHtmlTest
    build-depends:    base ^>=4.19.1.0,
                       HUnit
 
@@ -67,7 +68,9 @@ executable md-to-html-runner
     main-is:          Main.hs
 
     -- Modules included in this executable, other than Main.
-    -- other-modules:
+    other-modules:
+        MdToHTML
+        MdToHtmlTest
 
     -- LANGUAGE extensions used by modules in this package.
     -- other-extensions: