diff --git a/setup.py b/setup.py
index 0bb4f00ca..15e48f4d5 100644
--- a/setup.py
+++ b/setup.py
@@ -176,7 +176,14 @@ def tail_is(*suffixes):
             "License :: OSI Approved :: MIT License",
         ],
         package_dir={"": "src"},
-        packages=setuptools.find_namespace_packages(where="src", include=["debugpy*"]),
+        packages=[
+            "debugpy",
+            "debugpy.adapter",
+            "debugpy.common",
+            "debugpy.launcher",
+            "debugpy.server",
+            "debugpy._vendored",
+        ],
         package_data={
             "debugpy": ["ThirdPartyNotices.txt"],
             "debugpy._vendored": [
diff --git a/src/debugpy/_vendored/pydevd/pydevd_plugins/__init__.py b/src/debugpy/_vendored/pydevd/pydevd_plugins/__init__.py
new file mode 100644
index 000000000..bb61062c9
--- /dev/null
+++ b/src/debugpy/_vendored/pydevd/pydevd_plugins/__init__.py
@@ -0,0 +1,2 @@
+import pkgutil
+__path__ = pkgutil.extend_path(__path__, __name__)
diff --git a/src/debugpy/_vendored/pydevd/pydevd_plugins/extensions/__init__.py b/src/debugpy/_vendored/pydevd/pydevd_plugins/extensions/__init__.py
new file mode 100644
index 000000000..bb61062c9
--- /dev/null
+++ b/src/debugpy/_vendored/pydevd/pydevd_plugins/extensions/__init__.py
@@ -0,0 +1,2 @@
+import pkgutil
+__path__ = pkgutil.extend_path(__path__, __name__)
diff --git a/src/debugpy/_vendored/pydevd/pydevd_plugins/extensions/types/__init__.py b/src/debugpy/_vendored/pydevd/pydevd_plugins/extensions/types/__init__.py
new file mode 100644
index 000000000..bb61062c9
--- /dev/null
+++ b/src/debugpy/_vendored/pydevd/pydevd_plugins/extensions/types/__init__.py
@@ -0,0 +1,2 @@
+import pkgutil
+__path__ = pkgutil.extend_path(__path__, __name__)
diff --git a/tests/debugpy/test_numpy.py b/tests/debugpy/test_numpy.py
new file mode 100644
index 000000000..aa70a19e3
--- /dev/null
+++ b/tests/debugpy/test_numpy.py
@@ -0,0 +1,77 @@
+# Copyright (c) Microsoft Corporation. All rights reserved.
+# Licensed under the MIT License. See LICENSE in the project root
+# for license information.
+
+from tests import debug
+from tests.patterns import some
+
+
+def test_ndarray(pyfile, target, run):
+    @pyfile
+    def code_to_debug():
+        import numpy
+        import debuggee
+
+        debuggee.setup()
+        a = numpy.array([123, 456], numpy.int32)
+        print(a)  # @bp
+
+    with debug.Session() as session:
+        session.config["variablePresentation"] = {"all": "hide", "protected": "inline"}
+        with run(session, target(code_to_debug)):
+            session.set_breakpoints(code_to_debug, all)
+
+        stop = session.wait_for_stop()
+        scopes = session.request("scopes", {"frameId": stop.frame_id})["scopes"]
+        globals_ref = scopes[0]["variablesReference"]
+        vars = session.request(
+            "variables",
+            {"variablesReference": globals_ref},
+        )["variables"]
+        print(vars)
+
+        # Fetch children variables of the array.
+        (a,) = (v for v in vars if v["name"] == "a")
+        a_vars = session.request(
+            "variables",
+            {"variablesReference": a["variablesReference"]},
+        )["variables"]
+        print(a_vars)
+
+        # Fetch the actual array items
+        (items,) = (v for v in a_vars if v["name"] == "[0:2] ")
+        a_items = session.request(
+            "variables",
+            {"variablesReference": items["variablesReference"]},
+        )["variables"]
+        print(a_items)
+
+        assert a_items == [
+            some.dict.containing(
+                {
+                    "type": "int32",
+                    "name": "0",
+                    "value": "123",
+                    "variablesReference": some.int,
+                }
+            ),
+            some.dict.containing(
+                {
+                    "type": "int32",
+                    "name": "1",
+                    "value": "456",
+                    "variablesReference": some.int,
+                }
+            ),
+            some.dict.containing(
+                {
+                    "type": "int",
+                    "name": "len()",
+                    "value": "2",
+                    "presentationHint": {"attributes": ["readOnly"]},
+                    "variablesReference": 0,
+                }
+            ),
+        ]
+
+        session.request_continue()
diff --git a/tests/requirements.txt b/tests/requirements.txt
index f6678ce61..12784fe35 100644
--- a/tests/requirements.txt
+++ b/tests/requirements.txt
@@ -13,6 +13,7 @@ psutil
 ## Used in Python code that is run/debugged by the tests:
 
 django
-requests
-gevent
 flask
+gevent
+numpy
+requests