diff --git a/Lib/test/test_embed.py b/Lib/test/test_embed.py
index f926301..c52cb99 100644
--- a/Lib/test/test_embed.py
+++ b/Lib/test/test_embed.py
@@ -208,7 +208,7 @@
         Checks that sys.warnoptions and sys._xoptions can be set before the
         runtime is initialized (otherwise they won't be effective).
         """
-        env = dict(PYTHONPATH=os.pathsep.join(sys.path))
+        env = dict(os.environ, PYTHONPATH=os.pathsep.join(sys.path))
         out, err = self.run_embedded_interpreter(
                         "pre_initialization_sys_options", env=env)
         expected_output = (
diff --git a/Misc/NEWS.d/next/Tests/2018-04-27-11-46-35.bpo-33358._OcR59.rst b/Misc/NEWS.d/next/Tests/2018-04-27-11-46-35.bpo-33358._OcR59.rst
new file mode 100644
index 0000000..89406e9
--- /dev/null
+++ b/Misc/NEWS.d/next/Tests/2018-04-27-11-46-35.bpo-33358._OcR59.rst
@@ -0,0 +1,2 @@
+Fix ``test_embed.test_pre_initialization_sys_options()`` when the interpreter
+is built with ``--enable-shared``.