diff --git a/.travis.yml b/.travis.yml
index 17e9bd0..2b435bd 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -9,24 +9,24 @@ env:
   matrix:
     # RACKET_VERSION is an argument to install-racket.sh
     #- RACKET_VERSION=6.3 # scribble/example is available on ≥ 6.4
-    - 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=HEAD
+    - RACKET_VERSION=6.4    COVER=false
+    - RACKET_VERSION=6.5    COVER=false
+    - RACKET_VERSION=6.6    COVER=false
+    - RACKET_VERSION=6.7    COVER=false
+    - RACKET_VERSION=6.8    COVER=false
+    - RACKET_VERSION=6.9    COVER=true
+    - RACKET_VERSION=6.10   COVER=true 
+    - RACKET_VERSION=6.10.1 COVER=true 
+    - RACKET_VERSION=6.11   COVER=true 
+    - RACKET_VERSION=6.12   COVER=true 
+    - RACKET_VERSION=7.0    COVER=true 
+    - RACKET_VERSION=7.1    COVER=true 
+    - RACKET_VERSION=7.2    COVER=true 
+    - RACKET_VERSION=HEAD   COVER=true 
 
 before_install:
 - curl -L https://raw.githubusercontent.com/greghendershott/travis-racket/master/install-racket.sh | bash
-- raco pkg install --deps search-auto doc-coverage cover cover-codecov # or cover-coveralls
+- if $COVER; 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
@@ -34,7 +34,7 @@ install:
 script:
 - raco test -r -p "$(basename "$TRAVIS_BUILD_DIR")"
 - raco setup --check-pkg-deps --unused-pkg-deps --no-zo --no-launcher --no-install --no-post-install --no-docs --pkgs "$(basename "$TRAVIS_BUILD_DIR")"
-- raco doc-coverage -s '^ ' "$(basename "$TRAVIS_BUILD_DIR")"
-- raco cover -s main -s test -s doc -f codecov -f html -d ~/coverage . || true
+- if $COVER; then raco doc-coverage -s '^ ' "$(basename "$TRAVIS_BUILD_DIR")"; fi
+- if $COVER; then raco cover -s main -s test -s doc -f codecov -f html -d ~/coverage . || true; fi
 # TODO: add an option to cover to run the "outer" module too, not just the submodules.
-# TODO: deploy the coverage info.
\ No newline at end of file
+# TODO: deploy the coverage info.