diff --git a/manifests/requirements.pp b/manifests/requirements.pp
index e8c253fa..9d245be3 100644
--- a/manifests/requirements.pp
+++ b/manifests/requirements.pp
@@ -88,8 +88,11 @@
       replace => false,
       content => '# Puppet will install and/or update pip packages listed here',
     }
+
+    $local_subscribe = File[$requirements]
+  } else {
+    $local_subscribe = undef
   }
-  $local_subscribe = File[$requirements]
 
   exec { "python_requirements${name}":
     provider    => shell,
diff --git a/spec/acceptance/declared_requirements_install_spec.rb b/spec/acceptance/declared_requirements_install_spec.rb
new file mode 100644
index 00000000..185e6db2
--- /dev/null
+++ b/spec/acceptance/declared_requirements_install_spec.rb
@@ -0,0 +1,24 @@
+require 'spec_helper_acceptance'
+
+describe 'requirements' do
+  it 'checks declared requirements file is installed to venv' do
+    pp = <<-EOS
+    file { '/tmp/requirements.txt':
+      ensure  => 'present',
+      content => 'requests',
+    }
+
+    python::pyvenv { '/tmp/pyvenv':
+      ensure  => 'present',
+    }
+
+    python::requirements { '/tmp/requirements.txt':
+      virtualenv => '/tmp/pyvenv'
+    }
+    EOS
+
+    apply_manifest(pp, catch_failures: true)
+
+    expect(shell('/tmp/pyvenv/bin/pip3 list --no-index | grep requests').stdout).to match(%r{requests +\d+.\d+.\d+})
+  end
+end