diff --git a/nox/command.py b/nox/command.py
index 8a55c1fa..7ddb1da8 100644
--- a/nox/command.py
+++ b/nox/command.py
@@ -92,7 +92,10 @@ def run(
         success_codes = [0]
 
     cmd, args = args[0], args[1:]
-    full_cmd = f"{cmd} {_shlex_join(args)}"
+    try:
+        full_cmd = f"{cmd} {_shlex_join(args)}"
+    except TypeError:
+        full_cmd = f"{cmd} {args}"
 
     cmd_path = which(cmd, paths)
 
diff --git a/tests/test_command.py b/tests/test_command.py
index a05ab820..121edf11 100644
--- a/tests/test_command.py
+++ b/tests/test_command.py
@@ -22,6 +22,7 @@
 import subprocess
 import sys
 import time
+from pathlib import Path
 from textwrap import dedent
 from unittest import mock
 
@@ -112,6 +113,15 @@ def test_run_verbosity_failed_command(capsys, caplog):
     assert not logs
 
 
+def test_run_non_str():
+    result = nox.command.run(
+        [Path(PYTHON), "-c", "import sys; print(sys.argv)", Path(PYTHON)],
+        silent=True,
+    )
+
+    assert PYTHON in result
+
+
 def test_run_env_unicode():
     result = nox.command.run(
         [PYTHON, "-c", 'import os; print(os.environ["SIGIL"])'],