diff --git a/.travis.yml b/.travis.yml
index 002fc22..7113143 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -20,10 +20,10 @@ env:
     # 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=6.0   RECENT=false
-    - RACKET_VERSION=6.1   RECENT=false
-    - RACKET_VERSION=6.1.1 RECENT=true
-    - RACKET_VERSION=6.2   RECENT=true
+    #- RACKET_VERSION=6.0   RECENT=false
+    #- RACKET_VERSION=6.1   RECENT=false
+    #- RACKET_VERSION=6.1.1 RECENT=true
+    #- RACKET_VERSION=6.2   RECENT=true
     - RACKET_VERSION=6.3   RECENT=true
     - RACKET_VERSION=6.4   RECENT=true
     - RACKET_VERSION=6.5   RECENT=true