diff --git a/lib/code/config.rb b/lib/code/config.rb
index d28aabf..1ec8ddb 100644
--- a/lib/code/config.rb
+++ b/lib/code/config.rb
@@ -57,8 +57,7 @@ def get_property_value(property)
 
     def store_property_to_config(property, property_value, config)
       config.add(property, property_value)
-
-      file = File.open ".codeconfig", "w"
+      file = File.open '.codeconfig', 'w+'
       config.write file
       file.close
     end
diff --git a/lib/code/system.rb b/lib/code/system.rb
index 0b286f7..dc19524 100644
--- a/lib/code/system.rb
+++ b/lib/code/system.rb
@@ -56,8 +56,16 @@ def command_failed?
       not $?.success?
     end
 
+    def print(text)
+      STDOUT.print text
+    end
+
     def puts(text)
-      Kernel.puts text
+      STDOUT.puts text
+    end
+
+    def gets
+      STDIN.gets
     end
 
     def noecho_gets
diff --git a/spec/code/system_spec.rb b/spec/code/system_spec.rb
index ff84787..4bd982d 100644
--- a/spec/code/system_spec.rb
+++ b/spec/code/system_spec.rb
@@ -4,15 +4,15 @@ module Code
   module System
     describe "#prompt" do
       it "should print the prompt, then ask for and return the input" do
-        expect(System).to receive(:print).with("Test: ").and_return("")
-        expect(System).to receive(:gets).and_return("test_user")
+        expect(STDOUT).to receive(:print).with("Test: ").and_return("")
+        expect(STDIN).to receive(:gets).and_return("test_user")
         input = System.prompt "Test"
         expect(input).to eq "test_user"
       end
 
       it "should strip special characters from the input" do
-        allow(System).to receive(:print).and_return("")
-        allow(System).to receive(:gets).and_return("test\n")
+        allow(STDOUT).to receive(:print).and_return("")
+        allow(STDIN).to receive(:gets).and_return("test\n")
 
         input = System.prompt ""
         expect(input).to eq "test"