diff --git a/library/general/test/linuxrc_test.rb b/library/general/test/linuxrc_test.rb
index b1bdd3be4..bdb40d301 100755
--- a/library/general/test/linuxrc_test.rb
+++ b/library/general/test/linuxrc_test.rb
@@ -171,6 +171,16 @@ def load_install_inf(defaults_replacement={})
       load_install_inf
       expect(Linuxrc.InstallInf("Locale")).to be_equal(DEFAULT_INSTALL_INF["Locale"])
     end
+
+    it "returns nil if value for unknown key is requested" do
+      load_install_inf
+      expect(Linuxrc.InstallInf("Unknown Key Requested")).to be_nil
+    end
+
+    it "returns nil if value for 'nil' key is requested" do
+      load_install_inf
+      expect(Linuxrc.InstallInf(nil)).to be_nil
+    end
   end
 
   describe "#keys" do