diff --git a/README.md b/README.md
index 232a2dd61df84da60017a2a4b936a5d3606e8ee4..21b0012abc429128d2e0a360b68ae969f94d8abd 100644
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+++ b/README.md
@@ -1067,6 +1067,7 @@ Notes:
 
 - Keys must be strings not symbols when calling `add_stub` or `set_default_stub`. For example `'latitude' =>` not `:latitude =>`.
 - To clear stubs (e.g. prior to another spec), use `Geocoder::Lookup::Test.reset`. This will clear all stubs _including the default stub_.
+- The stubbed result objects returned by the Test lookup do not support all the methods real result objects do. If you need to test interaction with real results it may be better to use an external stubbing tool and something like WebMock or VCR to prevent network calls.
 
 
 Command Line Interface