diff --git a/Library/Homebrew/test/caveats_spec.rb b/Library/Homebrew/test/caveats_spec.rb
index d8be9dc521..176d8e6ca8 100644
--- a/Library/Homebrew/test/caveats_spec.rb
+++ b/Library/Homebrew/test/caveats_spec.rb
@@ -26,4 +26,51 @@ describe Caveats do
       expect(described_class.new(f)).not_to be_empty
     end
   end
+
+  describe "#caveats" do
+    context "when f.plist is not nil" do
+      it "prints plist startup information when f.plist_startup is not nil" do
+        f = formula do
+          url "foo-1.0"
+          def plist
+            "plist_test.plist"
+          end
+          plist_options startup: true
+        end
+        expect(described_class.new(f).caveats).to include("startup:\n  sudo brew")
+      end
+
+      it "prints plist login information when f.plist_startup is nil" do
+        f = formula do
+          url "foo-1.0"
+          def plist
+            "plist_test.plist"
+          end
+        end
+        expect(described_class.new(f).caveats).to include("login:\n  brew")
+      end
+    end
+
+    context "when f.keg_only is not nil" do
+      it "tells formula is keg_only and gives information about command to be run when f.bin and f.sbin are directories" do
+        Path = Pathname.new("path")
+        f = formula do
+          url "foo-1.0"
+          keg_only "some reason"
+        end
+
+        allow(f).to receive(:bin).and_return(Path)
+        allow(f.bin).to receive(:directory?).and_return(true)
+
+        allow(f).to receive(:sbin).and_return(Path)
+        allow(f.sbin).to receive(:directory?).and_return(true)
+
+        caveats = described_class.new(f).caveats
+
+        expect(caveats).to include("keg-only")
+        expect(caveats).to include(f.opt_bin.to_s)
+        expect(caveats).to include(f.opt_sbin.to_s)
+      end
+    end
+  end
 end