diff --git a/package-testing/spec/package/airgapped_usage_spec.rb b/package-testing/spec/package/airgapped_usage_spec.rb
index 59e44a557..c46303e71 100644
--- a/package-testing/spec/package/airgapped_usage_spec.rb
+++ b/package-testing/spec/package/airgapped_usage_spec.rb
@@ -29,6 +29,8 @@
 
     context 'when validating the module' do
       context "with puppet #{PDK_VERSION[:latest][:major]}" do
+        let(:ruby_version) { ruby_for_puppet(PDK_VERSION[:latest][:major]) }
+
         describe command("pdk validate --puppet-version=#{PDK_VERSION[:latest][:major]}") do
           let(:cwd) { module_name }
 
@@ -42,7 +44,7 @@
             subject { super().content.gsub(/^DEPENDENCIES.+?\n\n/m, '') }
 
             it 'is identical to the vendored lockfile' do
-              vendored_lockfile = File.join(install_dir, 'share', 'cache', "Gemfile-#{PDK_VERSION[:latest][:ruby]}.lock")
+              vendored_lockfile = File.join(install_dir, 'share', 'cache', "Gemfile-#{ruby_version}.lock")
 
               expect(subject).to eq(file(vendored_lockfile).content.gsub(/^DEPENDENCIES.+?\n\n/m, ''))
             end
diff --git a/package-testing/spec/package/support/spec_utils.rb b/package-testing/spec/package/support/spec_utils.rb
index 3a53b43ec..6b211715b 100644
--- a/package-testing/spec/package/support/spec_utils.rb
+++ b/package-testing/spec/package/support/spec_utils.rb
@@ -48,11 +48,11 @@ def latest_ruby
 
   def ruby_for_puppet(pupver)
     ruby_pattern = case pupver
-                   when /^4\./ then '2.1.*'
-                   when /^5\./ then '2.4.*'
-                   when /^6\./ then '2.5.*'
-                   when /^7\./ then '2.7.*'
-                   when /^8\./ then '3.2.*'
+                   when /^4/ then '2.1.*'
+                   when /^5/ then '2.4.*'
+                   when /^6/ then '2.5.*'
+                   when /^7/ then '2.7.*'
+                   when /^8/ then '3.2.*'
                    end
 
     return unless ruby_pattern
diff --git a/package-testing/spec/package/validate_a_new_module_spec.rb b/package-testing/spec/package/validate_a_new_module_spec.rb
index 3a36e40d4..abd5d449e 100644
--- a/package-testing/spec/package/validate_a_new_module_spec.rb
+++ b/package-testing/spec/package/validate_a_new_module_spec.rb
@@ -19,6 +19,8 @@
 
   context 'when validating the module' do
     context "with puppet #{PDK_VERSION[:latest][:major]}" do
+      let(:ruby_version) { ruby_for_puppet(PDK_VERSION[:latest][:major]) }
+
       describe command("pdk validate --puppet-version=#{PDK_VERSION[:latest][:major]}") do
         let(:cwd) { module_name }
 
@@ -32,7 +34,7 @@
           subject { super().content.gsub(/^DEPENDENCIES.+?\n\n/m, '') }
 
           it 'is identical to the vendored lockfile' do
-            vendored_lockfile = File.join(install_dir, 'share', 'cache', "Gemfile-#{PDK_VERSION[:latest][:ruby]}.lock")
+            vendored_lockfile = File.join(install_dir, 'share', 'cache', "Gemfile-#{ruby_version}.lock")
 
             expect(subject).to eq(file(vendored_lockfile).content.gsub(/^DEPENDENCIES.+?\n\n/m, ''))
           end