diff --git a/src/tox_gh/plugin.py b/src/tox_gh/plugin.py
index 5802429..bc03547 100644
--- a/src/tox_gh/plugin.py
+++ b/src/tox_gh/plugin.py
@@ -6,7 +6,7 @@
 import pathlib
 import shutil
 import sys
-from typing import TYPE_CHECKING, Dict
+from typing import TYPE_CHECKING, Any, Dict
 
 from tox.config.loader.memory import MemoryLoader
 from tox.config.loader.section import Section
@@ -80,14 +80,37 @@ def tox_add_core_config(core_conf: ConfigSet, state: State) -> None:
         state.conf.core.loaders.insert(0, MemoryLoader(env_list=env_list))
 
 
+installing = False
+
+
+@impl
+def tox_on_install(tox_env: ToxEnv, arguments: Any, section: str, of_type: str) -> None:  # noqa: ANN401, ARG001
+    """
+    Run before installing to prepare an environment.
+
+    :param tox_env: the tox environment
+    :param arguments: installation arguments
+    :param section: section of the installation
+    :param of_type: type of the installation
+    """
+    global installing  # noqa: PLW0603
+    if tox_env.core["is_on_gh_action"] and not installing:
+        installing = True
+        print("::group::tox:install")  # noqa: T201
+
+
 @impl
-def tox_before_run_commands(tox_env: ToxEnv) -> None:
+def tox_before_run_commands(tox_env: ToxEnv) -> None:  # noqa: ARG001
     """
     Run logic before tox run commands.
 
     :param tox_env: the tox environment
     """
+    global installing  # noqa: PLW0603
     if tox_env.core["is_on_gh_action"]:
+        assert installing  # noqa: S101
+        installing = False
+        print("::endgroup::")  # noqa: T201
         print(f"::group::tox:{tox_env.name}")  # noqa: T201
 
 
diff --git a/tests/test_tox_gh.py b/tests/test_tox_gh.py
index b1bb67b..d3d0416 100644
--- a/tests/test_tox_gh.py
+++ b/tests/test_tox_gh.py
@@ -58,13 +58,17 @@ def test_gh_ok(monkeypatch: MonkeyPatch, tox_project: ToxProjectCreator, tmp_pat
     assert result.out.splitlines() == [
         "ROOT: running tox-gh",
         "ROOT: tox-gh set a, b",
+        "::group::tox:install",
         "a: freeze> python -m pip freeze --all",
         ANY,  # freeze list
+        "::endgroup::",
         "::group::tox:a",
         "::endgroup::",
         ANY,  # a finished
+        "::group::tox:install",
         "b: freeze> python -m pip freeze --all",
         ANY,  # freeze list
+        "::endgroup::",
         "::group::tox:b",
         "::endgroup::",
         ANY,  # a status
@@ -101,15 +105,19 @@ def test_gh_fail(monkeypatch: MonkeyPatch, tox_project: ToxProjectCreator, tmp_p
     assert result.out.splitlines() == [
         "ROOT: running tox-gh",
         "ROOT: tox-gh set a, b",
+        "::group::tox:install",
         "a: freeze> python -m pip freeze --all",
         ANY,  # freeze list
+        "::endgroup::",
         "::group::tox:a",
         ANY,  # "a: commands[0]> python -c 'exit(1)'", but without the quotes on Windows.
         ANY,  # process details
         "::endgroup::",
         ANY,  # a finished
+        "::group::tox:install",
         "b: freeze> python -m pip freeze --all",
         ANY,  # freeze list
+        "::endgroup::",
         "::group::tox:b",
         ANY,  # "b: commands[0]> python -c 'exit(1)'", but without the quotes on Windows.
         ANY,  # b process details