2 files changed, 3 insertions, 3 deletions
diff --git a/mrbgems/mruby-hash-ext/mrblib/hash.rb b/mrbgems/mruby-hash-ext/mrblib/hash.rb
index 5056d0720..ec8bd05fb 100644
--- a/mrbgems/mruby-hash-ext/mrblib/hash.rb
+++ b/mrbgems/mruby-hash-ext/mrblib/hash.rb
@@ -130,7 +130,7 @@ class Hash
       elsif none != NONE
         none
       else
-        raise RuntimeError, "Key not found: #{key}"
+        raise KeyError, "Key not found: #{key}"
       end
     else
       self[key]
@@ -156,7 +156,7 @@ class Hash
 
     self.each do |k, v|
       self.delete(k) if block.call(k, v)
-    end 
+    end
     self
   end
 
diff --git a/mrbgems/mruby-hash-ext/test/hash.rb b/mrbgems/mruby-hash-ext/test/hash.rb
index 4950ef354..ef25acbe7 100644
--- a/mrbgems/mruby-hash-ext/test/hash.rb
+++ b/mrbgems/mruby-hash-ext/test/hash.rb
@@ -79,7 +79,7 @@ assert('Hash#fetch') do
   begin
     h.fetch("gnu")
   rescue => e
-    assert_kind_of(StandardError, e);
+    assert_kind_of(KeyError, e);
   end
 end