diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 4b3fffd..fc98906 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -20,7 +20,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        ruby: ["2.7", "3.0", "3.1", "3.2", "3.3", "3.4", "4.0", "head"]
+        ruby: ["3.2", "3.3", "3.4", "4.0", "head"]
     steps:
       - uses: actions/checkout@v7
       - uses: ruby/setup-ruby@v1
@@ -31,3 +31,38 @@ jobs:
       - run: git config --global user.name 'github-actions[bot]'
       - run: git config --global user.email 'github-actions[bot]@users.noreply.github.com'
       - run: bundle exec rake test
+  test-legacy:
+    name: "Test / Ruby ${{ matrix.ruby }}"
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        ruby: ["2.7", "3.0", "3.1"]
+    env:
+      BUNDLE_GEMFILE: gemfiles/legacy.gemfile
+    steps:
+      - uses: actions/checkout@v7
+      - uses: ruby/setup-ruby@v1
+        with:
+          ruby-version: ${{ matrix.ruby }}
+          bundler-cache: true
+          bundler: latest
+      - run: git config --global user.name 'github-actions[bot]'
+      - run: git config --global user.email 'github-actions[bot]@users.noreply.github.com'
+      - run: |
+          # Work around hard-coded expectation of gemfile location
+          cp ${BUNDLE_GEMFILE} Gemfile
+          cp ${BUNDLE_GEMFILE}.lock Gemfile.lock
+          sed -i 's/path: "\.\."/path: "."/' Gemfile
+      - run: bundle exec rake test
+  test-all:
+    name: "Test / All"
+    runs-on: ubuntu-latest
+    needs: test
+    if: always()
+    steps:
+      - name: All tests ok
+        if: ${{ !(contains(needs.*.result, 'failure')) }}
+        run: exit 0
+      - name: Some tests failed
+        if: ${{ contains(needs.*.result, 'failure') }}
+        run: exit 1
diff --git a/.gitignore b/.gitignore
index 4e0f123..769cb44 100644
--- a/.gitignore
+++ b/.gitignore
@@ -8,3 +8,4 @@
 /spec/reports/
 /tmp/
 /Gemfile.lock
+/gemfiles/*.lock
diff --git a/Gemfile b/Gemfile
index ff872d7..f985cb7 100644
--- a/Gemfile
+++ b/Gemfile
@@ -3,9 +3,8 @@
 source "https://rubygems.org"
 gemspec
 
-gem "activesupport", "~> 7.1.3" # Needed for factory_bot 6.3
 gem "cgi" # Needed for vcr on Ruby 3.5+
-gem "factory_bot", "~> 6.3.0"
+gem "factory_bot", "~> 6.6.0"
 gem "irb"
 gem "megatest", "~> 0.11.0"
 gem "minitest-snapshots", "~> 1.1"
diff --git a/gemfiles/legacy.gemfile b/gemfiles/legacy.gemfile
new file mode 100644
index 0000000..af2c830
--- /dev/null
+++ b/gemfiles/legacy.gemfile
@@ -0,0 +1,15 @@
+# frozen_string_literal: true
+
+source "https://rubygems.org"
+gemspec path: ".."
+
+gem "activesupport", "~> 7.1.3" # Needed for factory_bot 6.3
+gem "factory_bot", "~> 6.3.0"
+gem "megatest", "~> 0.11.0"
+gem "minitest-snapshots", "~> 1.1"
+gem "mocha", "~> 3.0"
+gem "observer"
+gem "openssl"
+gem "rake", "~> 13.0"
+gem "vcr", "~> 6.2"
+gem "webmock", "~> 3.23"