diff --git a/spec/integration/environment_setup_spec.rb b/spec/integration/environment_setup_spec.rb
index <HASH>..<HASH> 100644
--- a/spec/integration/environment_setup_spec.rb
+++ b/spec/integration/environment_setup_spec.rb
@@ -17,6 +17,6 @@ describe 'Setting up environment' do
       end
     end
 
-    expect(schema[:users]).to be_instance_of(Axiom::Relation::Variable)
+    expect(schema[:users]).to be_instance_of(Axiom::Relation::Variable::Materialized)
   end
 end
diff --git a/spec/unit/rom/repository/element_writer_spec.rb b/spec/unit/rom/repository/element_writer_spec.rb
index <HASH>..<HASH> 100644
--- a/spec/unit/rom/repository/element_writer_spec.rb
+++ b/spec/unit/rom/repository/element_writer_spec.rb
@@ -14,5 +14,5 @@ describe Repository, '#[]=' do
 
   it { should eq(relation) }
 
-  it { should be_instance_of(Axiom::Relation::Variable) }
+  it { should be_instance_of(Axiom::Relation::Variable::Materialized) }
 end
Update tests to pass with latest memory adapter