diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 7704685..6d6a8eb 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -74,7 +74,7 @@ jobs:
       - name: RSpec
         env:
           RAILS_VERSION: ${{ matrix.rails }}
-          DB_ADAPTER: ${{ matrix.adapter }}
+          DATABASE_URL: ${{ matrix.adapter }}
           BUNDLE_GEMFILE: gemfiles/${{ matrix.rails }}.gemfile
           WITH_ADVISORY_LOCK_PREFIX: ${{ github.run_id }}
         run: bin/rake
diff --git a/.github/workflows/ci_jruby.yml b/.github/workflows/ci_jruby.yml
index c7d0156..a8def78 100644
--- a/.github/workflows/ci_jruby.yml
+++ b/.github/workflows/ci_jruby.yml
@@ -63,7 +63,7 @@ jobs:
       - name: RSpec
         env:
           RAILS_VERSION: ${{ matrix.rails }}
-          DB_ADAPTER: ${{ matrix.adapter }}
+          DATABASE_URL: ${{ matrix.adapter }}
           BUNDLE_GEMFILE: gemfiles/${{ matrix.rails }}.gemfile
           WITH_ADVISORY_LOCK_PREFIX: ${{ github.run_id }}
         run: bin/rake
diff --git a/.github/workflows/ci_truffleruby.yml b/.github/workflows/ci_truffleruby.yml
index b61630f..db32001 100644
--- a/.github/workflows/ci_truffleruby.yml
+++ b/.github/workflows/ci_truffleruby.yml
@@ -66,7 +66,7 @@ jobs:
       - name: RSpec
         env:
           RAILS_VERSION: ${{ matrix.rails }}
-          DB_ADAPTER: ${{ matrix.adapter }}
+          DATABASE_URL: ${{ matrix.adapter }}
           BUNDLE_GEMFILE: gemfiles/${{ matrix.rails }}.gemfile
           WITH_ADVISORY_LOCK_PREFIX: ${{ github.run_id }}
         run: bin/rake