diff --git a/bundler/spec/dependabot/bundler/file_parser/file_preparer_spec.rb b/bundler/spec/dependabot/bundler/file_parser/file_preparer_spec.rb
index ab68ba11ade..56509a7204c 100644
--- a/bundler/spec/dependabot/bundler/file_parser/file_preparer_spec.rb
+++ b/bundler/spec/dependabot/bundler/file_parser/file_preparer_spec.rb
@@ -7,23 +7,14 @@
 RSpec.describe Dependabot::Bundler::FileParser::FilePreparer do
   let(:preparer) { described_class.new(dependency_files: dependency_files) }
 
-  let(:dependency_files) { [gemfile, lockfile] }
-
-  let(:gemfile) do
-    Dependabot::DependencyFile.new(content: gemfile_body, name: "Gemfile")
-  end
-  let(:lockfile) do
-    Dependabot::DependencyFile.new(content: lockfile_body, name: "Gemfile.lock")
-  end
-  let(:gemfile_body) { fixture("ruby", "gemfiles", "Gemfile") }
-  let(:lockfile_body) { fixture("ruby", "lockfiles", "Gemfile.lock") }
+  let(:dependency_files) { bundler_project_dependency_files("gemfile") }
 
   describe "#prepared_dependency_files" do
     subject(:prepared_dependency_files) { preparer.prepared_dependency_files }
 
     describe "the updated Gemfile" do
       subject { prepared_dependency_files.find { |f| f.name == "Gemfile" } }
-      its(:content) { is_expected.to eq(gemfile.content) }
+      its(:content) { is_expected.to include('gem "business", "~> 1.4.0"') }
     end
 
     describe "the updated lockfile" do
@@ -31,7 +22,7 @@
         prepared_dependency_files.find { |f| f.name == "Gemfile.lock" }
       end
 
-      its(:content) { is_expected.to eq(lockfile.content) }
+      its(:content) { is_expected.to include("1.10.6") }
     end
 
     describe "the updated gemspec" do
@@ -39,13 +30,7 @@
         prepared_dependency_files.find { |f| f.name == "example.gemspec" }
       end
 
-      let(:dependency_files) { [gemfile, lockfile, gemspec] }
-      let(:gemspec) do
-        Dependabot::DependencyFile.new(
-          content: fixture("ruby", "gemspecs", "with_require"),
-          name: "example.gemspec"
-        )
-      end
+      let(:dependency_files) { bundler_project_dependency_files("gemfile_gemspec_with_require") }
 
       its(:content) { is_expected.to include("begin\nrequire ") }
       its(:content) { is_expected.to include(%(version      = "0.0.1")) }
@@ -56,31 +41,19 @@
         prepared_dependency_files.find { |f| f.name == ".ruby-version" }
       end
 
-      let(:dependency_files) { [gemfile, lockfile, ruby_version] }
-      let(:ruby_version) do
-        Dependabot::DependencyFile.new(
-          content: "2.4.1",
-          name: ".ruby-version"
-        )
-      end
+      let(:dependency_files) { bundler_project_dependency_files("ruby_version_file") }
 
-      its(:content) { is_expected.to eq(ruby_version.content) }
+      its(:content) { is_expected.to eq("2.2.0\n") }
     end
 
     describe "the updated .specification file" do
       subject do
-        prepared_dependency_files.find { |f| f.name == ".specification" }
+        prepared_dependency_files.find { |f| f.name == "plugins/example/.specification" }
       end
 
-      let(:dependency_files) { [gemfile, lockfile, specification] }
-      let(:specification) do
-        Dependabot::DependencyFile.new(
-          content: fixture("ruby", "specifications", "statesman"),
-          name: ".specification"
-        )
-      end
+      let(:dependency_files) { bundler_project_dependency_files("version_specified_gemfile_specification") }
 
-      its(:content) { is_expected.to eq(specification.content) }
+      its(:content) { is_expected.to start_with("--- !ruby/object:Gem::Specification") }
     end
   end
 end
diff --git a/bundler/spec/fixtures/projects/bundler1/gemfile_gemspec_with_require/Gemfile b/bundler/spec/fixtures/projects/bundler1/gemfile_gemspec_with_require/Gemfile
new file mode 100644
index 00000000000..bb897e7e7bb
--- /dev/null
+++ b/bundler/spec/fixtures/projects/bundler1/gemfile_gemspec_with_require/Gemfile
@@ -0,0 +1,6 @@
+# frozen_string_literal: true
+
+source "https://rubygems.org"
+
+gem "business", "~> 1.4.0"
+gem "statesman", "~> 1.2.0"
diff --git a/bundler/spec/fixtures/projects/bundler1/gemfile_gemspec_with_require/Gemfile.lock b/bundler/spec/fixtures/projects/bundler1/gemfile_gemspec_with_require/Gemfile.lock
new file mode 100644
index 00000000000..65d23b6c746
--- /dev/null
+++ b/bundler/spec/fixtures/projects/bundler1/gemfile_gemspec_with_require/Gemfile.lock
@@ -0,0 +1,15 @@
+GEM
+  remote: https://rubygems.org/
+  specs:
+    business (1.4.0)
+    statesman (1.2.1)
+
+PLATFORMS
+  ruby
+
+DEPENDENCIES
+  business (~> 1.4.0)
+  statesman (~> 1.2.0)
+
+BUNDLED WITH
+   1.10.6
diff --git a/bundler/spec/fixtures/projects/bundler1/gemfile_gemspec_with_require/example.gemspec b/bundler/spec/fixtures/projects/bundler1/gemfile_gemspec_with_require/example.gemspec
new file mode 100644
index 00000000000..da77199c39d
--- /dev/null
+++ b/bundler/spec/fixtures/projects/bundler1/gemfile_gemspec_with_require/example.gemspec
@@ -0,0 +1,44 @@
+# frozen_string_literal: true
+
+lib = File.expand_path('../lib', __FILE__)
+$LOAD_PATH.unshift(lib) unless $LOAD_PATH.include?(lib)
+require 'example/version'
+
+Gem::Specification.new do |spec|
+  spec.name         = "example"
+  spec.version      = Example::VERSION
+  spec.summary      = "Automated dependency management #{Example::VERSION}"
+  spec.description  = "Core logic for updating a GitHub repos dependencies"
+
+  spec.author       = "Dependabot"
+  spec.email        = "support@dependabot.com"
+  spec.homepage     = "https://github.com/hmarr/example"
+  spec.license      = "MIT"
+
+  spec.require_path = "lib"
+  spec.files        = Dir["CHANGELOG.md", "LICENSE.txt", "README.md",
+                          "lib/**/*", "helpers/**/*"]
+  Find.find("lib", "helpers") do |path|
+    if ignores.any? { |i| File.fnmatch(i, "/" + path, File::FNM_DOTMATCH) }
+      Find.prune
+    else
+      spec.files << path unless File.directory?(path)
+    end
+  end
+
+  spec.required_ruby_version = ">= 2.4.0"
+  spec.required_rubygems_version = ">= 2.6.11"
+
+  spec.add_dependency "bundler", ">= 1.12.0"
+  spec.add_dependency "excon", "~> 0.55"
+  spec.add_dependency "gemnasium-parser", "~> 0.1"
+  spec.add_dependency "gems", "~> 1.0"
+  spec.add_dependency "octokit", "~> 4.6"
+  spec.add_dependency "gitlab", "~> 4.1"
+
+  spec.add_development_dependency "webmock", "~> 2.3.1"
+  spec.add_development_dependency "rspec", "~> 3.5.0"
+  spec.add_development_dependency "rspec-its", "~> 1.2.0"
+  spec.add_development_dependency "rubocop", "~> 0.48.0"
+  spec.add_development_dependency "rake"
+end