diff --git a/python/grass/script/core.py b/python/grass/script/core.py
index 6ee8e0f987f..7cc50b58733 100644
--- a/python/grass/script/core.py
+++ b/python/grass/script/core.py
@@ -237,6 +237,18 @@ def scan(gisbase, directory):
     for directory in ("bin", "scripts"):
         scan(gisbase, directory)
 
+    # Add addon path if it exists
+    if env.get("GRASS_ADDON_BASE"):
+        addon_base = env["GRASS_ADDON_BASE"]
+        scan(addon_base, "bin")
+        if not sys.platform.startswith("win"):
+            scan(addon_base, "scripts")
+
+    if env.get("GRASS_ADDON_PATH"):
+        for path in env["GRASS_ADDON_PATH"].split(os.pathsep):
+            if path:
+                scan(path, "")
+
     return set(cmd), scripts
 
 
diff --git a/python/grass/script/tests/grass_script_core_get_commands_test.py b/python/grass/script/tests/grass_script_core_get_commands_test.py
index 27c94c7f62d..b710a65a304 100644
--- a/python/grass/script/tests/grass_script_core_get_commands_test.py
+++ b/python/grass/script/tests/grass_script_core_get_commands_test.py
@@ -2,7 +2,7 @@
 
 import os
 import sys
-
+import stat
 import pytest
 
 import grass.script as gs
@@ -65,3 +65,31 @@ def test_in_session(tmp_path):
     with gs.setup.init(project, env=os.environ.copy()) as session:
         executables_set, scripts_dict = gs.get_commands(env=session.env)
     common_test_code(executables_set, scripts_dict)
+
+
+def test_addon_path_multiple_dirs(tmp_path):
+    """Test that get_commands scans multiple directories in GRASS_ADDON_PATH"""
+
+    test_dirs = [
+        (tmp_path / "addon_a", "my_custom_cmd_a"),
+        (tmp_path / "addon_b", "my_custom_cmd_b"),
+    ]
+
+    ext = ".py" if sys.platform == "win32" else ""
+
+    for path, cmd_name in test_dirs:
+        path.mkdir()
+        file_path = path / f"{cmd_name}{ext}"
+        file_path.write_text(
+            "#!/usr/bin/env python3\nprint('Test ADDON PATH')", encoding="utf-8"
+        )
+        file_path.chmod(stat.S_IRWXU)
+
+    new_path = os.pathsep.join(str(p) for p, _ in test_dirs)
+    env = os.environ.copy()
+    env["GRASS_ADDON_PATH"] = new_path
+
+    executables_set, _ = gs.get_commands(env=env)
+
+    assert "my_custom_cmd_a" in executables_set
+    assert "my_custom_cmd_b" in executables_set
diff --git a/scripts/g.extension/tests/conftest.py b/scripts/g.extension/tests/conftest.py
index 6fc0679c69e..7a18856f2b1 100644
--- a/scripts/g.extension/tests/conftest.py
+++ b/scripts/g.extension/tests/conftest.py
@@ -5,19 +5,15 @@
 import pytest
 
 import grass.script as gs
-from grass.tools import Tools
 
 
 # Using module-scoped fixture to avoid overhead of downloading addons repo.
 @pytest.fixture(scope="module")
-def tools(tmp_path_factory):
-    """Tools with modified addon base directory (scope: module)"""
+def session(tmp_path_factory):
+    """Session with modified addon base directory (scope: module)"""
     tmp_path = tmp_path_factory.mktemp("g_extension_tests")
     gs.create_project(tmp_path / "test")
     env = os.environ.copy()
     env["GRASS_ADDON_BASE"] = str(tmp_path / "addons")
-    with (
-        gs.setup.init(tmp_path / "test", env=env) as session,
-        Tools(session=session, consistent_return_value=True) as tools,
-    ):
-        yield tools
+    with gs.setup.init(tmp_path / "test", env=env) as session:
+        yield session
diff --git a/scripts/g.extension/tests/g_extension_test.py b/scripts/g.extension/tests/g_extension_test.py
index c6fd946e92c..f0d4e5b292a 100644
--- a/scripts/g.extension/tests/g_extension_test.py
+++ b/scripts/g.extension/tests/g_extension_test.py
@@ -1,11 +1,18 @@
 """Test g.extension"""
 
 import pytest
+import grass.script as gs
+from grass.tools import Tools
 
 
 # This should cover both C and Python tools.
 @pytest.mark.parametrize("name", ["r.stream.distance", "r.lake.series"])
-def test_install(tools, name):
+def test_install(session, name):
     """Test that a tools installs and gives help message"""
-    tools.g_extension(extension=name)
-    assert tools.call_cmd([name, "--help"]).stderr
+    with Tools(session=session, consistent_return_value=True) as tools:
+        tools.g_extension(extension=name)
+        assert tools.call_cmd([name, "--help"]).stderr
+    # Check that the installed extension is in the get_commands() list
+    # i.e., GRASS_ADDON_BASE is accessible or not.
+    commands = gs.get_commands(env=session.env)[0]
+    assert name in commands, f"Extension {name} not found in get_commands() list"