diff --git a/.travis.yml b/.travis.yml
index d1bfd4b..938df89 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -8,34 +8,34 @@ env:
     - PATH="$RACKET_DIR/bin:$PATH"
   matrix:
     # RACKET_VERSION is an argument to install-racket.sh
-    - RACKET_VERSION=6.4
-    - RACKET_VERSION=6.5
-    - RACKET_VERSION=6.6
-    - RACKET_VERSION=6.7
-    - RACKET_VERSION=6.8
-    - RACKET_VERSION=6.9
-    - RACKET_VERSION=6.10
-    - RACKET_VERSION=6.10.1
-    - RACKET_VERSION=6.11
-    - RACKET_VERSION=6.12
-    - RACKET_VERSION=7.0
-    - RACKET_VERSION=7.1
-    - RACKET_VERSION=7.2
-    - RACKET_VERSION=7.3
-    - RACKET_VERSION=7.4
-    - RACKET_VERSION=7.5
-    - RACKET_VERSION=7.6
-    - RACKET_VERSION=7.7
-    - RACKET_VERSION=7.8
-    - RACKET_VERSION=7.9
-    - RACKET_VERSION=8.0
-    - RACKET_CS=1 RACKET_VERSION=8.0
-    - RACKET_VERSION=HEAD
+    - RACKET_VERSION=6.4 COV=false
+    - RACKET_VERSION=6.5 COV=false
+    - RACKET_VERSION=6.6 COV=false
+    - RACKET_VERSION=6.7 COV=false
+    - RACKET_VERSION=6.8 COV=false
+    - RACKET_VERSION=6.9 COV=true
+    - RACKET_VERSION=6.10 COV=true
+    - RACKET_VERSION=6.10.1 COV=true
+    - RACKET_VERSION=6.11 COV=true
+    - RACKET_VERSION=6.12 COV=true
+    - RACKET_VERSION=7.0 COV=true
+    - RACKET_VERSION=7.1 COV=true
+    - RACKET_VERSION=7.2 COV=true
+    - RACKET_VERSION=7.3 COV=true
+    - RACKET_VERSION=7.4 COV=true
+    - RACKET_VERSION=7.5 COV=true
+    - RACKET_VERSION=7.6 COV=true
+    - RACKET_VERSION=7.7 COV=true
+    - RACKET_VERSION=7.8 COV=true
+    - RACKET_VERSION=7.9 COV=true
+    - RACKET_VERSION=8.0 COV=true
+    - RACKET_CS=1 RACKET_VERSION=8.0 COV=true
+    - RACKET_VERSION=HEAD COV=true
 
 before_install:
 #- curl -L https://raw.githubusercontent.com/greghendershott/travis-racket/master/install-racket.sh | bash
 - curl -L https://raw.githubusercontent.com/jsmaniac/travis-racket/patch-1/install-racket.sh | bash
-- raco pkg install --deps search-auto doc-coverage cover cover-codecov # or cover-coveralls
+- if $COV; then raco pkg install --deps search-auto doc-coverage cover cover-codecov; fi # or cover-coveralls
 
 install:
 - raco pkg install --deps search-auto -j 2