diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 2ab30b7a..5f8419ee 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -18,19 +18,19 @@ jobs:
       matrix:
         include:
           # Linux
-          - { cabal: "3.10", os: ubuntu-latest,  ghc: "8.0.2"  }
-          - { cabal: "3.10", os: ubuntu-latest,  ghc: "8.2.2"  }
-          - { cabal: "3.10", os: ubuntu-latest,  ghc: "8.4.4"  }
-          - { cabal: "3.10", os: ubuntu-latest,  ghc: "8.6.5"  }
-          - { cabal: "3.10", os: ubuntu-latest,  ghc: "8.8.4"  }
-          - { cabal: "3.10", os: ubuntu-latest,  ghc: "8.10.7" }
-          - { cabal: "3.10", os: ubuntu-latest,  ghc: "9.0.2"  }
-          - { cabal: "3.10", os: ubuntu-latest,  ghc: "9.2.8"  }
-          - { cabal: "3.10", os: ubuntu-latest,  ghc: "9.4.8"  }
-          - { cabal: "3.10", os: ubuntu-latest,  ghc: "9.6.5"  }
-          - { cabal: "3.10", os: ubuntu-latest,  ghc: "9.6.5",
+          - { cabal: "3.10", os: ubuntu-22.04,  ghc: "8.0.2"  }
+          - { cabal: "3.10", os: ubuntu-22.04,  ghc: "8.2.2"  }
+          - { cabal: "3.10", os: ubuntu-22.04,  ghc: "8.4.4"  }
+          - { cabal: "3.10", os: ubuntu-22.04,  ghc: "8.6.5"  }
+          - { cabal: "3.10", os: ubuntu-22.04,  ghc: "8.8.4"  }
+          - { cabal: "3.10", os: ubuntu-22.04,  ghc: "8.10.7" }
+          - { cabal: "3.10", os: ubuntu-22.04,  ghc: "9.0.2"  }
+          - { cabal: "3.10", os: ubuntu-22.04,  ghc: "9.2.8"  }
+          - { cabal: "3.10", os: ubuntu-22.04,  ghc: "9.4.8"  }
+          - { cabal: "3.10", os: ubuntu-22.04,  ghc: "9.6.5"  }
+          - { cabal: "3.10", os: ubuntu-22.04,  ghc: "9.6.5",
               flags: "-fUnsafeChecks -fInternalChecks" }
-          - { cabal: "3.10", os: ubuntu-latest,  ghc: "9.8.2"  }
+          - { cabal: "3.10", os: ubuntu-22.04,  ghc: "9.8.2"  }
           # Win
           - { cabal: "3.10", os: windows-latest, ghc: "8.4.4"  }
           # OOM when building tests
@@ -73,7 +73,7 @@ jobs:
       run: |
         sudo apt-get install -y libpapi-dev
         echo FLAG_PAPI=-fBenchPAPI >> "$GITHUB_ENV"
-      if: matrix.os == 'ubuntu-latest'
+      if: matrix.os == 'ubuntu-22.04'
     # ----------------
     - name: Versions
       run: |
diff --git a/vector/tests/Utilities.hs b/vector/tests/Utilities.hs
index abba2f6e..5aa9e8b0 100644
--- a/vector/tests/Utilities.hs
+++ b/vector/tests/Utilities.hs
@@ -1,3 +1,4 @@
+{-# LANGUAGE CPP #-}
 {-# LANGUAGE DefaultSignatures #-}
 {-# LANGUAGE FlexibleInstances #-}
 {-# LANGUAGE GADTs #-}
diff --git a/vector/vector.cabal b/vector/vector.cabal
index 1ba9b306..ee8f1071 100644
--- a/vector/vector.cabal
+++ b/vector/vector.cabal
@@ -208,7 +208,7 @@ common tests-common
     Tests.Vector.UnitTests
     Utilities
 
-  default-extensions: CPP,
+  default-extensions:
               ScopedTypeVariables,
               PatternGuards,
               MultiParamTypeClasses,