diff --git a/lib/classifier-reborn/extensions/hasher.rb b/lib/classifier-reborn/extensions/hasher.rb
index c1bf1de..a6b4c5f 100644
--- a/lib/classifier-reborn/extensions/hasher.rb
+++ b/lib/classifier-reborn/extensions/hasher.rb
@@ -27,7 +27,7 @@ def clean_word_hash(str, language = 'en', enable_stemmer = true)
     def word_hash_for_words(words, language = 'en', enable_stemmer = true)
       d = Hash.new(0)
       words.each do |word|
-        next unless word.length > 2 && !STOPWORDS[language].include?(word)
+        next unless word.length > 0 && !STOPWORDS[language].include?(word)
         if enable_stemmer
           d[word.stem.intern] += 1
         else
diff --git a/test/bayes/bayesian_common_tests.rb b/test/bayes/bayesian_common_tests.rb
index 902ba92..c007e3f 100644
--- a/test/bayes/bayesian_common_tests.rb
+++ b/test/bayes/bayesian_common_tests.rb
@@ -139,10 +139,10 @@ def test_skip_empty_training_and_classification
     classifier.train('Ruby', '')
     assert classifier.categories.empty?
     classifier.train('Ruby', 'To be or not to be')
-    assert classifier.categories.empty?
+    refute classifier.categories.empty?
     classifier.train('Ruby', 'A really sweet language')
     refute classifier.categories.empty?
-    assert_equal Float::INFINITY, classifier.classify_with_score('To be or not to be')[1]
+    assert_equal Float::INFINITY, classifier.classify_with_score('')[1]
   end
 
   def test_empty_string_stopwords
diff --git a/test/extensions/hasher_test.rb b/test/extensions/hasher_test.rb
index 336a8b7..c362d41 100644
--- a/test/extensions/hasher_test.rb
+++ b/test/extensions/hasher_test.rb
@@ -56,7 +56,7 @@ def test_add_custom_stopword_path
     temp_stopwords_name = File.basename(temp_stopwords.path)
 
     Hasher.add_custom_stopword_path(temp_stopwords_path)
-    hash = { list: 1, cool: 1 }
+    hash = {:is=>1, :a=>1, :list=>1, :of=>1, :cool=>1}
     assert_equal hash, Hasher.clean_word_hash("this is a list of cool words!", temp_stopwords_name)
   end