diff --git a/jedi/plugins/registry.py b/jedi/plugins/registry.py
index 06e4aede..c1a0b749 100644
--- a/jedi/plugins/registry.py
+++ b/jedi/plugins/registry.py
@@ -4,9 +4,9 @@ This is not a plugin, this is just the place were plugins are registered.
 
 from jedi.plugins import stdlib
 from jedi.plugins import flask
+from jedi.plugins import pytest
 from jedi.plugins import django
 from jedi.plugins import plugin_manager
-from jedi.plugins import pytest
 
 
 plugin_manager.register(stdlib, flask, pytest, django)
diff --git a/jedi/plugins/stdlib.py b/jedi/plugins/stdlib.py
index c32535e1..448f2b50 100644
--- a/jedi/plugins/stdlib.py
+++ b/jedi/plugins/stdlib.py
@@ -21,7 +21,7 @@ from jedi.inference.arguments import \
 from jedi.inference import analysis
 from jedi.inference import compiled
 from jedi.inference.value.instance import \
-    AnonymousMethodExecutionContext, MethodExecutionContext, TreeInstance
+    AnonymousMethodExecutionContext, MethodExecutionContext
 from jedi.inference.base_value import ContextualizedNode, \
     NO_VALUES, ValueSet, ValueWrapper, LazyValueWrapper
 from jedi.inference.value import ClassValue, ModuleValue