diff --git a/README.md b/README.md
index ed6ce6f..2a074ec 100644
--- a/README.md
+++ b/README.md
@@ -44,6 +44,7 @@ digest = Digest::SHA3.new(224)
 Run the test suite as follows:
 
 ```bash
+gem install test-unit
 make test
 ```
 
diff --git a/digest-keccak.gemspec b/digest-keccak.gemspec
index e89d698..5da5a40 100644
--- a/digest-keccak.gemspec
+++ b/digest-keccak.gemspec
@@ -3,7 +3,7 @@ require File.expand_path('lib/digest/sha3/version')
 Gem::Specification.new do |s|
   s.name = "digest-keccak"
   s.version = Digest::SHA3::Version::STRING
-  s.summary = "The SHA-3 (Keccak) hash used by Ethereum"
+  s.summary = "The SHA-3 (Keccak) hash used by Ethereum."
   s.email = "ruby@q9f.cc"
   s.homepage = "https://github.com/q9f/digest-keccak-ruby"
   s.description = "The SHA-3 (Keccak) hash use by Ethereum. This does not implement the final FIPS202 standard, today known as SHA3 but rather an early version, commonly referred to as Keccak."
diff --git a/test/data/README b/test/data/README.txt
similarity index 100%
rename from test/data/README
rename to test/data/README.txt