AVRO-2733: No longer explicitly require rubygems
diff --git a/share/test/interop/bin/test_rpc_interop.sh b/share/test/interop/bin/test_rpc_interop.sh
index f80437f..7ea16b2 100755
--- a/share/test/interop/bin/test_rpc_interop.sh
+++ b/share/test/interop/bin/test_rpc_interop.sh
@@ -34,7 +34,7 @@
 }
 
 ruby_tool() {
-  ruby -rubygems -Ilang/ruby/lib lang/ruby/test/tool.rb "$@"
+  ruby -Ilang/ruby/lib lang/ruby/test/tool.rb "$@"
 }
 
 proto=share/test/schemas/simple.avpr