diff --git a/spec/lib/msf/java/rmi/client/registry_spec.rb b/spec/lib/msf/java/rmi/client/registry_spec.rb
index ce7496e567..702d37cfc3 100644
--- a/spec/lib/msf/java/rmi/client/registry_spec.rb
+++ b/spec/lib/msf/java/rmi/client/registry_spec.rb
@@ -163,6 +163,10 @@ describe Msf::Java::Rmi::Client::Registry do
         allow_any_instance_of(::StringIO).to receive(:get_once) do |io, length, timeout|
           io.read
         end
+
+        allow_any_instance_of(::StringIO).to receive(:has_read_data?) do |io|
+          false
+        end
       end
 
       it "returns empty array" do
@@ -181,6 +185,10 @@ describe Msf::Java::Rmi::Client::Registry do
         allow_any_instance_of(::StringIO).to receive(:get_once) do |io, length, timeout|
           io.read
         end
+
+        allow_any_instance_of(::StringIO).to receive(:has_read_data?) do |io|
+          false
+        end
       end
 
       it "returns the list of registered names" do
@@ -202,6 +210,10 @@ describe Msf::Java::Rmi::Client::Registry do
         allow_any_instance_of(::StringIO).to receive(:get_once) do |io, length, timeout|
           io.read
         end
+
+        allow_any_instance_of(::StringIO).to receive(:has_read_data?) do |io|
+          false
+        end
       end
 
       it "raises an Rex::Proto::Rmi::Exception" do
@@ -220,6 +232,10 @@ describe Msf::Java::Rmi::Client::Registry do
         allow_any_instance_of(::StringIO).to receive(:get_once) do |io, length, timeout|
           io.read
         end
+
+        allow_any_instance_of(::StringIO).to receive(:has_read_data?) do |io|
+          false
+        end
       end
 
       it "returns the reference information" do