diff --git a/l3build.lua b/l3build.lua
index cea38e13..f9f8c0ba 100644
--- a/l3build.lua
+++ b/l3build.lua
@@ -2360,7 +2360,7 @@ end
 
 function writemanifest()
 
-  file_types = {"source","docu","bib"}
+  file_types = {"source","docu","bib","tests"}
 
   file_lists = {
     ["source"] = {
@@ -2378,6 +2378,11 @@ function writemanifest()
                    ["files"] = {bibfiles,bstfiles,makeindexfiles},
                    ["dir"]   = "./",
                  },
+    ["tests"] = {
+                   ["name"]  = "Test files",
+                   ["files"] = {"*"..lvtext,"*"..lveext,"*"..tlgext},
+                   ["dir"]   = testfiledir,
+                 },
   }
 
   local f = assert(io.open(manifestfile, "w"))