1 files changed, 5 insertions, 1 deletions
diff --git a/spec/ruby/core/kernel/shared/sprintf.rb b/spec/ruby/core/kernel/shared/sprintf.rb
index 26bd189593..2b2c6c9b63 100644
--- a/spec/ruby/core/kernel/shared/sprintf.rb
+++ b/spec/ruby/core/kernel/shared/sprintf.rb
@@ -362,6 +362,10 @@ describe :kernel_sprintf, shared: true do
         obj.should_receive(:inspect).and_return("<inspect-result>")
         @method.call("%p", obj).should == "<inspect-result>"
       end
+
+      it "substitutes 'nil' for nil" do
+        @method.call("%p", nil).should == "nil"
+      end
     end
 
     describe "s" do
@@ -445,7 +449,7 @@ describe :kernel_sprintf, shared: true do
 
       it "is escaped by %" do
         @method.call("%%").should == "%"
-        @method.call("%%d", 10).should == "%d"
+        @method.call("%%d").should == "%d"
       end
     end
   end