diff --git a/jedi/api/completion.py b/jedi/api/completion.py
index 72f5205a..5cae004e 100644
--- a/jedi/api/completion.py
+++ b/jedi/api/completion.py
@@ -11,7 +11,7 @@ from jedi.evaluate import imports
 from jedi.api import keywords
 from jedi.evaluate.helpers import evaluate_call_of_leaf, parse_dotted_names
 from jedi.evaluate.filters import get_global_filters
-from jedi.evaluate.gradual.conversion import stub_to_python_context_set
+from jedi.evaluate.gradual.conversion import convert_contexts
 from jedi.parser_utils import get_statement_of_position
 
 
@@ -246,12 +246,9 @@ class Completion:
                     origin_scope=user_context.tree_node):
                 completion_names += filter.values()
 
-        for context in contexts:
-            if not context.is_stub():
-                continue
-
-            actual_contexts = stub_to_python_context_set(context, ignore_compiled=True)
-            for c in actual_contexts:
+        python_contexts = convert_contexts(contexts)
+        for c in python_contexts:
+            if c not in contexts:
                 for filter in c.get_filters(
                         search_global=False,
                         origin_scope=user_context.tree_node):
diff --git a/jedi/evaluate/finder.py b/jedi/evaluate/finder.py
index 3f1488a1..7b8b0015 100644
--- a/jedi/evaluate/finder.py
+++ b/jedi/evaluate/finder.py
@@ -29,7 +29,7 @@ from jedi.evaluate.filters import get_global_filters
 from jedi.evaluate.names import TreeNameDefinition
 from jedi.evaluate.base_context import ContextSet, NO_CONTEXTS
 from jedi.parser_utils import is_scope, get_parent_scope
-from jedi.evaluate.gradual.conversion import stub_to_python_context_set
+from jedi.evaluate.gradual.conversion import convert_contexts
 
 
 class NameFinder(object):
@@ -123,8 +123,7 @@ class NameFinder(object):
             yield f
         # This covers the case where a stub files are incomplete.
         if self._context.is_stub():
-            contexts = stub_to_python_context_set(self._context, ignore_compiled=True)
-            for c in contexts:
+            for c in convert_contexts(ContextSet({self._context})):
                 for f in c.get_filters():
                     yield f
 
diff --git a/jedi/evaluate/gradual/conversion.py b/jedi/evaluate/gradual/conversion.py
index 1a1fd84f..ac0382a5 100644
--- a/jedi/evaluate/gradual/conversion.py
+++ b/jedi/evaluate/gradual/conversion.py
@@ -5,7 +5,7 @@ from jedi.evaluate.utils import to_list
 from jedi.evaluate.gradual.stub_context import StubModuleContext
 
 
-def stub_to_python_context_set(stub_context, ignore_compiled=False):
+def _stub_to_python_context_set(stub_context, ignore_compiled=False):
     stub_module = stub_context.get_root_context()
     if not stub_module.is_stub():
         return ContextSet([stub_context])
@@ -146,7 +146,7 @@ def convert_contexts(contexts, only_stubs=False, prefer_stubs=False, ignore_comp
             )
         else:
             return ContextSet.from_sets(
-                stub_to_python_context_set(stub_context, ignore_compiled=ignore_compiled)
+                _stub_to_python_context_set(stub_context, ignore_compiled=ignore_compiled)
                 or ContextSet({stub_context})
                 for stub_context in contexts
             )
diff --git a/jedi/evaluate/imports.py b/jedi/evaluate/imports.py
index f2326487..cbe65a8e 100644
--- a/jedi/evaluate/imports.py
+++ b/jedi/evaluate/imports.py
@@ -356,12 +356,9 @@ class Importer(object):
                 names += context.sub_modules_dict().values()
 
             if not only_modules:
-                from jedi.evaluate.gradual.conversion import stub_to_python_context_set
-                both_contexts = ContextSet.from_sets(
-                    stub_to_python_context_set(context, ignore_compiled=True)
-                    for context in contexts
-                    if context.is_stub()
-                ) | contexts
+                from jedi.evaluate.gradual.conversion import convert_contexts
+
+                both_contexts = contexts | convert_contexts(contexts)
                 for c in both_contexts:
                     for filter in c.get_filters(search_global=False):
                         names += filter.values()