Fix custom options behaviour
diff --git a/src/ProtocolBuffers.Test/CodedInputStreamTest.cs b/src/ProtocolBuffers.Test/CodedInputStreamTest.cs
index 2ad8c45..8944dbf 100644
--- a/src/ProtocolBuffers.Test/CodedInputStreamTest.cs
+++ b/src/ProtocolBuffers.Test/CodedInputStreamTest.cs
@@ -397,7 +397,7 @@
       try {
         input.ReadRawByte();
         Assert.Fail("Should have thrown an exception!");
-      } catch (InvalidProtocolBufferException e) {
+      } catch (InvalidProtocolBufferException) {
         // Success.
       }
 
@@ -407,7 +407,7 @@
       try {
         input.ReadRawBytes(16);  // Hits limit again.
         Assert.Fail("Should have thrown an exception!");
-      } catch (InvalidProtocolBufferException e) {
+      } catch (InvalidProtocolBufferException) {
         // Success.
       }
     }