diff --git a/example/.travis.yml b/example/.travis.yml
index c9aea27..65885dd 100644
--- a/example/.travis.yml
+++ b/example/.travis.yml
@@ -8,15 +8,12 @@ env:
     - RACKET_DIR=~/racket
   matrix:
     # Supply at least one RACKET_VERSION environment variable. This is
-    # used by the install-racket.sh script (run at before_install,
-    # below) to select the version of Racket to download and install.
+    # used by the install-racket.sh script to select the version of
+    # Racket to download and install.
     #
     # Supply more than one RACKET_VERSION (as in the example below) to
     # create a Travis-CI build matrix to test against multiple Racket
     # versions.
-    - RACKET_VERSION=6.1
-    - RACKET_VERSION=6.1.1
-    - RACKET_VERSION=6.2
     - RACKET_VERSION=6.3
     - RACKET_VERSION=6.4
     - RACKET_VERSION=6.5