diff --git a/eddy.gemspec b/eddy.gemspec
index f80ad18..f6a7d72 100644
--- a/eddy.gemspec
+++ b/eddy.gemspec
@@ -16,7 +16,7 @@ Gem::Specification.new do |spec|
     "homepage_uri" => spec.homepage,
     "source_code_uri" => spec.homepage,
     "changelog_uri" => "https://github.com/tcd/eddy/blob/master/CHANGELOG.md",
-    "documentation_uri" => "https://www.rubydoc.info/gems/eddy/#{gem.version}",
+    "documentation_uri" => "https://www.rubydoc.info/gems/eddy/#{spec.version}",
     "yard.run" => "yri", # use "yard" to build full HTML docs.
   }
 
diff --git a/test/eddy/c4_test.rb b/test/eddy/c4_test.rb
deleted file mode 100644
index 2387208..0000000
--- a/test/eddy/c4_test.rb
+++ /dev/null
@@ -1,9 +0,0 @@
-require "test_helper"
-
-class EddyTest < Minitest::Test
-
-  def test_that_it_has_a_version_number
-    refute_nil(Eddy::VERSION)
-  end
-
-end
diff --git a/test/eddy/eddy_test.rb b/test/eddy/eddy_test.rb
new file mode 100644
index 0000000..0f383a1
--- /dev/null
+++ b/test/eddy/eddy_test.rb
@@ -0,0 +1,22 @@
+require "test_helper"
+require "rubygems"
+
+class EddyTest < Minitest::Test
+
+  def test_that_it_has_a_version_number
+    refute_nil(Eddy::VERSION)
+  end
+
+  def test_that_versions_match
+    spec_path = File.join(Eddy.root_dir, "eddy.gemspec")
+    spec = Gem::Specification.load(spec_path)
+    assert_equal(Eddy::VERSION, spec.version.to_s)
+  end
+
+  def test_readme_links_to_correct_version
+    search_string = "[docs]: https://www.rubydoc.info/gems/eddy/#{Eddy::VERSION}"
+    readme = File.read(File.join(Eddy.root_dir, "readme.md"))
+    assert(readme.include?(search_string))
+  end
+
+end