diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 2bae6ed..e524308 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -9,8 +9,23 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        racket-version: ["7.4", "7.5", "7.6", "7.7", "7.8", "7.9", "current"]
+        racket-version: ["6.6", "6.7", "6.8", "6.9", "6.10.1", "6.11", "6.12", "7.0", "7.1", "7.2", "7.3", "7.4", "7.5", "7.6", "7.7", "7.8", "7.9", "current"]
         racket-variant: ["BC", "CS"]
+        # CS builds are only provided for versions 7.4 and up so avoid
+        # running the job for prior versions.
+        exclude:
+          - {racket-version: "6.6",    racket-variant: "CS"}
+          - {racket-version: "6.7",    racket-variant: "CS"}
+          - {racket-version: "6.8",    racket-variant: "CS"}
+          - {racket-version: "6.9",    racket-variant: "CS"}
+          - {racket-version: "6.10.1", racket-variant: "CS"}
+          - {racket-version: "6.11",   racket-variant: "CS"}
+          - {racket-version: "6.12",   racket-variant: "CS"}
+          - {racket-version: "7.0",    racket-variant: "CS"}
+          - {racket-version: "7.1",    racket-variant: "CS"}
+          - {racket-version: "7.2",    racket-variant: "CS"}
+          - {racket-version: "7.3",    racket-variant: "CS"}
+
     steps:
     - name: Checkout
       uses: actions/checkout@master
diff --git a/.travis.yml b/.travis.yml
deleted file mode 100644
index 50aa8f0..0000000
--- a/.travis.yml
+++ /dev/null
@@ -1,46 +0,0 @@
-# adapted from
-# https://github.com/greghendershott/travis-racket/blob/master/.travis.yml
-# Thanks Greg!
-
-dist: trusty
-language: c
-sudo: false
-
-env:
-  global:
-    - RACKET_DIR=~/racket
-  matrix:
-    - RACKET_VERSION=6.3
-    - RACKET_VERSION=6.6
-    - RACKET_VERSION=6.9
-    - RACKET_VERSION=6.12
-    - RACKET_VERSION=7.0
-    - RACKET_VERSION=7.3
-    - RACKET_VERSION=7.4
-    - RACKET_VERSION=7.5
-    - RACKET_VERSION=7.6
-    - RACKET_VERSION=HEAD
-    - RACKET_VERSION=HEADCS
-
-# You may want to test against certain versions of Racket, without
-# having them count against the overall success/failure.
-matrix:
-  allow_failures:
-    - env: RACKET_VERSION=HEAD
-    - env: RACKET_VERSION=HEADCS
-  # Fast finish: Overall build result is determined as soon as any of
-  # its rows have failed, or, all of its rows that aren't allowed to
-  # fail have succeeded.
-  fast_finish: true
-
-before_install:
-  - "export DISPLAY=:99.0" # needed for testing with `racket/gui`
-  - "sh -e /etc/init.d/xvfb start" # needed for testing with `racket/gui`
-  - git clone https://github.com/mbutterick/travis-racket.git
-  - cat travis-racket/install-racket.sh | bash # pipe to bash not sh!
-  - export PATH="${RACKET_DIR}/bin:${PATH}" #install-racket.sh can't set for us
-
-script:
- - cd ..   # Travis did a cd into the dir. Back up, for the next:
- - travis_retry raco pkg install --deps search-auto https://github.com/mbutterick/pollen.git
- - raco test -p pollen