diff --git a/jedi/inference/references.py b/jedi/inference/references.py
index d14307b5..df47dabb 100644
--- a/jedi/inference/references.py
+++ b/jedi/inference/references.py
@@ -4,7 +4,7 @@ import re
 from parso import python_bytes_to_unicode
 
 from jedi.debug import dbg
-from jedi.file_io import KnownContentFileIO
+from jedi.file_io import KnownContentFileIO, FolderIO
 from jedi.inference.names import SubModuleName
 from jedi.inference.imports import load_module_from_path
 from jedi.inference.filters import ParserTreeFilter
@@ -127,10 +127,10 @@ def find_references(module_context, tree_name, only_in_module=False):
 
     module_contexts = [module_context]
     if not only_in_module:
-        module_contexts.extend(
-            m for m in set(d.get_root_context() for d in found_names)
-            if m != module_context and m.tree_node is not None
-        )
+        for m in set(d.get_root_context() for d in found_names):
+            if m != module_context and m.tree_node is not None \
+                    and inf.project.path in m.py__file__().parents:
+                module_contexts.append(m)
     # For param no search for other modules is necessary.
     if only_in_module or any(n.api_type == 'param' for n in found_names):
         potential_modules = module_contexts
@@ -250,6 +250,11 @@ def _find_python_files_in_sys_path(inference_state, module_contexts):
             folder_io = folder_io.get_parent_folder()
 
 
+def _find_project_modules(inference_state, module_contexts):
+    except_ = [m.py__file__() for m in module_contexts]
+    yield from recurse_find_python_files(FolderIO(inference_state.project.path), except_)
+
+
 def get_module_contexts_containing_name(inference_state, module_contexts, name,
                                         limit_reduction=1):
     """
@@ -269,7 +274,10 @@ def get_module_contexts_containing_name(inference_state, module_contexts, name,
     if len(name) <= 2:
         return
 
-    file_io_iterator = _find_python_files_in_sys_path(inference_state, module_contexts)
+    # Currently not used, because there's only `scope=project` and `scope=file`
+    # At the moment there is no such thing as `scope=sys.path`.
+    # file_io_iterator = _find_python_files_in_sys_path(inference_state, module_contexts)
+    file_io_iterator = _find_project_modules(inference_state, module_contexts)
     yield from search_in_file_ios(inference_state, file_io_iterator, name,
                                   limit_reduction=limit_reduction)
 
diff --git a/test/completion/imports.py b/test/completion/imports.py
index 150f2743..bd1bf75b 100644
--- a/test/completion/imports.py
+++ b/test/completion/imports.py
@@ -202,6 +202,10 @@ from keyword import not_existing1, not_existing2
 from tokenize import io
 tokenize.generate_tokens
 
+import socket
+#? 14 ['SocketIO']
+socket.SocketIO
+
 # -----------------
 # builtins
 # -----------------
diff --git a/test/completion/usages.py b/test/completion/usages.py
index d708297e..8afffb40 100644
--- a/test/completion/usages.py
+++ b/test/completion/usages.py
@@ -383,3 +383,12 @@ usage_definition = 1
 if False:
     #< 8 (-3, 0), (0, 4), ('import_tree.references', 1, 21), ('import_tree.references', 5, 4)
     usage_definition()
+
+# -----------------
+# stdlib stuff
+# -----------------
+
+import socket
+#< (1, 21), (0, 7), ('socket', ..., 6), ('stub:socket', ..., 4), ('imports', ..., 7)
+socket.SocketIO
+some_socket = socket.SocketIO()
diff --git a/test/run.py b/test/run.py
index 92e21d61..e9c8ab09 100755
--- a/test/run.py
+++ b/test/run.py
@@ -107,6 +107,7 @@ import operator
 from ast import literal_eval
 from io import StringIO
 from functools import reduce
+from unittest.mock import ANY
 
 import parso
 from _pytest.outcomes import Skipped
@@ -275,6 +276,8 @@ class IntegrationTestCase(BaseTestCase):
         for pos_tup in positions:
             if type(pos_tup[0]) == str:
                 # this means that there is a module specified
+                if pos_tup[1] == ...:
+                    pos_tup = pos_tup[0], ANY, pos_tup[2]
                 wanted.append(pos_tup)
             else:
                 line = pos_tup[0]