diff --git a/test/run.go b/test/run.go
index 75eccb1dfd..83afce4282 100644
--- a/test/run.go
+++ b/test/run.go
@@ -51,8 +51,7 @@ var (
 
 	// dirs are the directories to look for *.go files in.
 	// TODO(bradfitz): just use all directories?
-	// TODO(rsc): Put syntax back. See issue 9968.
-	dirs = []string{".", "ken", "chan", "interface", "dwarf", "fixedbugs", "bugs"}
+	dirs = []string{".", "ken", "chan", "interface", "syntax", "dwarf", "fixedbugs", "bugs"}
 
 	// ratec controls the max number of tests running at a time.
 	ratec chan bool