diff --git a/lib/new_relic/agent/instrumentation/grape.rb b/lib/new_relic/agent/instrumentation/grape.rb
index c4b24d7379..75bae0a0df 100644
--- a/lib/new_relic/agent/instrumentation/grape.rb
+++ b/lib/new_relic/agent/instrumentation/grape.rb
@@ -19,13 +19,7 @@
 
   depends_on do
     begin
-      specs = if Bundler.rubygems.respond_to?(:installed_specs)
-        Bundler.rubygems.installed_specs
-      else
-        Bundler.rubygems.all_specs
-      end
-
-      if specs.map(&:name).include?('newrelic-grape')
+      if NewRelic::Helper.rubygems_specs.map(&:name).include?('newrelic-grape')
         NewRelic::Agent.logger.info('Not installing New Relic supported Grape instrumentation because the third party newrelic-grape gem is present')
         false
       else
diff --git a/lib/new_relic/control/frameworks/rails4.rb b/lib/new_relic/control/frameworks/rails4.rb
index 23d403dd69..b8545f92df 100644
--- a/lib/new_relic/control/frameworks/rails4.rb
+++ b/lib/new_relic/control/frameworks/rails4.rb
@@ -9,11 +9,7 @@ class Control
     module Frameworks
       class Rails4 < NewRelic::Control::Frameworks::Rails3
         def rails_gem_list
-          if Bundler.rubygems.respond_to?(:installed_specs)
-            Bundler.rubygems.installed_specs.map { |gem| "#{gem.name} (#{gem.version})" }
-          else
-            Bundler.rubygems.all_specs.map { |gem| "#{gem.name} (#{gem.version})" }
-          end
+          NewRelic::Helper.rubygems_specs.map { |gem| "#{gem.name} (#{gem.version})" }
         end
 
         def append_plugin_list
diff --git a/lib/new_relic/environment_report.rb b/lib/new_relic/environment_report.rb
index 1661bebeb6..301fe83c0f 100644
--- a/lib/new_relic/environment_report.rb
+++ b/lib/new_relic/environment_report.rb
@@ -44,11 +44,7 @@ def self.registered_reporters=(logic)
     ####################################
     report_on('Gems') do
       begin
-        if Bundler.rubygems.respond_to?(:installed_specs)
-          Bundler.rubygems.installed_specs.map { |gem| "#{gem.name}(#{gem.version})" }
-        else
-          Bundler.rubygems.all_specs.map { |gem| "#{gem.name}(#{gem.version})" }
-        end
+        NewRelic::Helper.rubygems_specs.map { |gem| "#{gem.name}(#{gem.version})" }
       rescue
         # There are certain rubygem, bundler, rails combinations (e.g. gem
         # 1.6.2, rails 2.3, bundler 1.2.3) where the code above throws an error
diff --git a/lib/new_relic/helper.rb b/lib/new_relic/helper.rb
index 7d17c89908..3f89b9e36b 100644
--- a/lib/new_relic/helper.rb
+++ b/lib/new_relic/helper.rb
@@ -82,5 +82,20 @@ def executable_in_path?(executable)
         File.exist?(executable_path) && File.file?(executable_path) && File.executable?(executable_path)
       end
     end
+
+    # Bundler version 2.5.12 deprecated all_specs and added installed_specs.
+    # To support newer Bundler versions, try to use installed_specs first,
+    # then fall back to all_specs.
+    # All callers expect this to be an array, so return an array if Bundler isn't defined
+    # @api private
+    def rubygems_specs
+      return [] unless defined?(Bundler)
+
+      if Bundler.rubygems.respond_to?(:installed_specs)
+        Bundler.rubygems.installed_specs
+      else
+        Bundler.rubygems.all_specs
+      end
+    end
   end
 end
diff --git a/lib/new_relic/language_support.rb b/lib/new_relic/language_support.rb
index 140d2455d2..31377e831a 100644
--- a/lib/new_relic/language_support.rb
+++ b/lib/new_relic/language_support.rb
@@ -90,11 +90,7 @@ def snakeize(string)
     def bundled_gem?(gem_name)
       return false unless defined?(Bundler)
 
-      if Bundler.rubygems.respond_to?(:installed_specs)
-        Bundler.rubygems.installed_specs.map(&:name).include?(gem_name)
-      else
-        Bundler.rubygems.all_specs.map(&:name).include?(gem_name)
-      end
+      NewRelic::Helper.rubygems_specs.map(&:name).include?(gem_name)
     rescue => e
       ::NewRelic::Agent.logger.info("Could not determine if third party #{gem_name} gem is installed", e)
       false
diff --git a/test/new_relic/helper_test.rb b/test/new_relic/helper_test.rb
index e47a838a40..44a66f4480 100644
--- a/test/new_relic/helper_test.rb
+++ b/test/new_relic/helper_test.rb
@@ -77,4 +77,26 @@ def test_run_command_sad_exception
       NewRelic::Helper.run_command('executable that existed at detection time but is not there now')
     end
   end
+
+  ## rubygems_specs
+  def test_rubygems_specs_returns_empty_array_without_bundler
+    stub(:defined?, nil, ['Bundler']) do
+      result = NewRelic::Helper.rubygems_specs
+
+      assert_instance_of Array, result
+      assert_empty Array, result
+    end
+  end
+
+  def test_rubygems_specs_works_with_all_specs_when_installed_specs_is_absent
+    Bundler.rubygems.stub(:respond_to?, nil, [':installed_specs']) do
+      assert_equal Bundler.rubygems.all_specs, NewRelic::Helper.rubygems_specs
+    end
+  end
+
+  def test_rubygems_specs_works_with_installed_specs
+    skip 'running a version of Bundler that has not defined installed_specs' unless Bundler.rubygems.respond_to?(:installed_specs)
+
+    assert_equal Bundler.rubygems.installed_specs, NewRelic::Helper.rubygems_specs
+  end
 end