diff --git a/jedi/api/__init__.py b/jedi/api/__init__.py
index bfb2951b..3f598851 100644
--- a/jedi/api/__init__.py
+++ b/jedi/api/__init__.py
@@ -37,7 +37,7 @@ from jedi.inference import InferenceState
 from jedi.inference import imports
 from jedi.inference.references import find_references
 from jedi.inference.arguments import try_iter_content
-from jedi.inference.helpers import get_module_names, infer_call_of_leaf
+from jedi.inference.helpers import infer_call_of_leaf
 from jedi.inference.sys_path import transform_path_to_dotted
 from jedi.inference.syntax_tree import tree_name_to_values
 from jedi.inference.value import ModuleValue
@@ -554,7 +554,7 @@ class Script(object):
         module_context = self._get_module_context()
         defs = [
             module_context.create_name(name)
-            for name in get_module_names(
+            for name in helpers.get_module_names(
                 self._module_node,
                 all_scopes=all_scopes,
                 definitions=definitions,
diff --git a/jedi/api/helpers.py b/jedi/api/helpers.py
index 07dcab8a..f06ab694 100644
--- a/jedi/api/helpers.py
+++ b/jedi/api/helpers.py
@@ -4,6 +4,7 @@ Helpers for the API
 import re
 from collections import namedtuple
 from textwrap import dedent
+from itertools import chain
 from functools import wraps
 
 from parso.python.parser import Parser
@@ -15,6 +16,7 @@ from jedi.inference.syntax_tree import infer_atom
 from jedi.inference.helpers import infer_call_of_leaf
 from jedi.inference.compiled import get_string_value_set
 from jedi.cache import signature_time_cache
+from jedi.parser_utils import get_parent_scope
 
 
 CompletionParts = namedtuple('CompletionParts', ['path', 'has_dot', 'name'])
@@ -464,6 +466,33 @@ def validate_line_column(func):
     return wrapper
 
 
+def get_module_names(module, all_scopes, definitions=True, references=False):
+    """
+    Returns a dictionary with name parts as keys and their call paths as
+    values.
+    """
+    def def_ref_filter(name):
+        is_def = name.is_definition()
+        return definitions and is_def or references and not is_def
+
+    names = list(chain.from_iterable(module.get_used_names().values()))
+    if not all_scopes:
+        # We have to filter all the names that don't have the module as a
+        # parent_scope. There's None as a parent, because nodes in the module
+        # node have the parent module and not suite as all the others.
+        # Therefore it's important to catch that case.
+
+        def is_module_scope_name(name):
+            parent_scope = get_parent_scope(name)
+            # async functions have an extra wrapper. Strip it.
+            if parent_scope and parent_scope.type == 'async_stmt':
+                parent_scope = parent_scope.parent
+            return parent_scope in (module, None)
+
+        names = [n for n in names if is_module_scope_name(n)]
+    return filter(def_ref_filter, names)
+
+
 def split_search_string(name):
     type, _, dotted_names = name.rpartition(' ')
     if type == 'def':
diff --git a/jedi/api/project.py b/jedi/api/project.py
index 7d4d841d..e3d45879 100644
--- a/jedi/api/project.py
+++ b/jedi/api/project.py
@@ -8,12 +8,11 @@ from jedi._compatibility import scandir
 from jedi.api.environment import get_cached_default_environment, create_environment
 from jedi.api.exceptions import WrongVersion
 from jedi.api.completion import search_in_module
-from jedi.api.helpers import split_search_string
+from jedi.api.helpers import split_search_string, get_module_names
 from jedi._compatibility import force_unicode
 from jedi.inference.sys_path import discover_buildout_paths
 from jedi.inference.cache import inference_state_as_method_param_cache
 from jedi.inference.references import recurse_find_python_files, search_in_file_ios
-from jedi.inference.helpers import get_module_names
 from jedi.inference import InferenceState
 from jedi.file_io import FolderIO
 from jedi.common.utils import traverse_parents
diff --git a/jedi/inference/helpers.py b/jedi/inference/helpers.py
index 1e1f6914..3e4d3952 100644
--- a/jedi/inference/helpers.py
+++ b/jedi/inference/helpers.py
@@ -8,7 +8,6 @@ from contextlib import contextmanager
 from parso.python import tree
 
 from jedi._compatibility import unicode
-from jedi.parser_utils import get_parent_scope
 
 
 def is_stdlib_path(path):
@@ -122,33 +121,6 @@ def get_names_of_node(node):
         return list(chain.from_iterable(get_names_of_node(c) for c in children))
 
 
-def get_module_names(module, all_scopes, definitions=True, references=False):
-    """
-    Returns a dictionary with name parts as keys and their call paths as
-    values.
-    """
-    def def_ref_filter(name):
-        is_def = name.is_definition()
-        return definitions and is_def or references and not is_def
-
-    names = list(chain.from_iterable(module.get_used_names().values()))
-    if not all_scopes:
-        # We have to filter all the names that don't have the module as a
-        # parent_scope. There's None as a parent, because nodes in the module
-        # node have the parent module and not suite as all the others.
-        # Therefore it's important to catch that case.
-
-        def is_module_scope_name(name):
-            parent_scope = get_parent_scope(name)
-            # async functions have an extra wrapper. Strip it.
-            if parent_scope and parent_scope.type == 'async_stmt':
-                parent_scope = parent_scope.parent
-            return parent_scope in (module, None)
-
-        names = [n for n in names if is_module_scope_name(n)]
-    return filter(def_ref_filter, names)
-
-
 def is_string(value):
     if value.inference_state.environment.version_info.major == 2:
         str_classes = (unicode, bytes)