diff --git a/.github/workflows/ci.yaml b/.github/workflows/ci.yaml
index a8a05b6..f034af3 100644
--- a/.github/workflows/ci.yaml
+++ b/.github/workflows/ci.yaml
@@ -15,7 +15,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        os: [macos-latest, ubuntu-latest]
+        os: [macos-latest, ubuntu-16.04, ubuntu-18.04, ubuntu-20.04]
 
     # Steps represent a sequence of tasks that will be executed as part of the job
     steps:
@@ -29,6 +29,7 @@ jobs:
         if [[ "${{ matrix.os }}" == macos* ]]; then
           brew install zsh fish
         elif [[ "${{ matrix.os }}" == ubuntu* ]]; then
+          sudo apt-add-repository -y ppa:fish-shell/release-3
           sudo apt -y update
           sudo apt -y install zsh fish
         fi