diff --git a/noxfile.py b/noxfile.py
index e0b4ca9e..75b71f96 100644
--- a/noxfile.py
+++ b/noxfile.py
@@ -2,18 +2,18 @@
 
 
 @nox.session
-def lint(session: nox.Session):
+def tests(session: nox.Session):
     session.install("favicons")  # TODO: remove
-    session.install(".[test]", "nox", "pyright")
+    session.install("pyright", "nox")
+    session.install("-e", ".[test]", "-e", "./test/_submodules/HexMod")
 
     session.run("pyright", "--warnings")
 
-
-@nox.session
-def tests(session: nox.Session):
-    session.install("favicons")  # TODO: remove
-    session.install(".[test]", "./test/_submodules/HexMod")
+    session.run("hexdoc", "export", "--props", "properties.toml")
+    session.run(
+        "hexdoc", "export", "--props", "test/_submodules/HexMod/doc/properties.toml"
+    )
 
     # test cookiecutter last so the extra package install doesn't interfere
-    session.run("pytest", "-k", "not test_cookiecutter")
-    session.run("pytest", "-k", "test_cookiecutter")
+    session.run("pytest", *session.posargs)
+    session.run("pytest", "-k", "test_cookiecutter", "--nox", *session.posargs)
diff --git a/test/_submodules/HexMod b/test/_submodules/HexMod
index 0d76e88a..f229e4f8 160000
--- a/test/_submodules/HexMod
+++ b/test/_submodules/HexMod
@@ -1 +1 @@
-Subproject commit 0d76e88a6b2d9ebe8704a887e30c645003168ee8
+Subproject commit f229e4f8ae178f54ccae9a046551d8d2e0643e45
diff --git a/test/conftest.py b/test/conftest.py
index 626e5637..9f6a4965 100644
--- a/test/conftest.py
+++ b/test/conftest.py
@@ -10,6 +10,7 @@
 from hexdoc.plugin import PluginManager
 
 longrun = pytest.mark.skipif("not config.getoption('longrun')")
+nox_only = pytest.mark.skipif("not config.getoption('nox')")
 
 
 # https://stackoverflow.com/a/43938191
@@ -20,6 +21,12 @@ def pytest_addoption(parser: Parser):
         dest="longrun",
         help="disable longrun-decorated tests",
     )
+    parser.addoption(
+        "--nox",
+        action="store_true",
+        dest="nox",
+        help="enable nox_only-decorated tests",
+    )
 
 
 class FilePathSnapshotExtension(SingleFileSnapshotExtension):
diff --git a/test/test_cookiecutter.py b/test/test_cookiecutter.py
index 5f2e9b46..3ffa1a8a 100644
--- a/test/test_cookiecutter.py
+++ b/test/test_cookiecutter.py
@@ -11,10 +11,10 @@
 
 from hexdoc._cli.app import render
 
-from .conftest import longrun
+from .conftest import nox_only
 
 
-@longrun
+@nox_only
 def test_cookiecutter(cookies: Cookies, monkeypatch: MonkeyPatch):
     result = cookies.bake(
         {