diff --git a/mrbgems/mruby-enum-lazy/test/lazy.rb b/mrbgems/mruby-enum-lazy/test/lazy.rb
index 145c73caf..a3090864a 100644
--- a/mrbgems/mruby-enum-lazy/test/lazy.rb
+++ b/mrbgems/mruby-enum-lazy/test/lazy.rb
@@ -46,15 +46,15 @@ assert("Enumerator::Lazy#to_enum") do
   assert_equal [0*1, 2*3, 4*5, 6*7], lazy_enum.map { |a| a.first * a.last }.first(4)
 end
 
-assert("Enumerator::Lazy#flat_map with arrays") do
+assert("Enumerator::Lazy#flat_map with array from block") do
   assert_equal [1, 10, 2, 20, 3, 30], [1, 2, 3].lazy.flat_map {|x| [x, x*10]}.force
 end
 
-assert("Enumerator::Lazy#flat_map with non-enumerable") do
+assert("Enumerator::Lazy#flat_map with non-enumerable from block") do
   assert_equal [1, 2, 3], [1, 2, 3].lazy.flat_map {|x| x}.force
 end
 
-assert("Enumerator::Lazy#flat_map with enumerable") do
+assert("Enumerator::Lazy#flat_map with nested array from block") do
   assert_equal [[1, 2], [3, 4]], [1, 3].lazy.flat_map {|x| [[x, x+1]]}.force
 end