diff --git a/pyproject.toml b/pyproject.toml
index e652d3c..cbe4d99 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -65,6 +65,9 @@ test = [
     "jsonfeed-util>=1.2,<2",
     "mkdocs-material[imaging]>=9.7,<9.8",
     "mkdocs-materialx[imaging]>=10.1.3,<11",
+    "properdocs>=1.6.7,<2",
+    "properdocs-theme-mkdocs>=1.6.5,<2",
+    "properdocs-theme-readthedocs>=1.6.5,<2",
     "pytest-cov>=6.9.1,<8",
     "validator-collection>=1.5,<1.6",
 ]
diff --git a/tests/__init__.py b/tests/__init__.py
index e69de29..559692c 100644
--- a/tests/__init__.py
+++ b/tests/__init__.py
@@ -0,0 +1,3 @@
+# redirect every mkdocs.* import to properdocs.* before any test module (or the
+# plugin itself) imports MkDocs, so that only ProperDocs classes are used.
+import properdocs.replacement  # noqa: F401
diff --git a/tests/base.py b/tests/base.py
index 4b77295..4bf2e6d 100644
--- a/tests/base.py
+++ b/tests/base.py
@@ -15,10 +15,10 @@
 # 3rd party
 from click.testing import CliRunner
 
-# MkDocs
-from mkdocs.__main__ import build_command
-from mkdocs.config import load_config
-from mkdocs.config.base import Config
+# ProperDocs
+from properdocs.__main__ import build_command
+from properdocs.config import load_config
+from properdocs.config.base import Config
 
 # package
 from mkdocs_rss_plugin.plugin import GitRssPlugin
@@ -78,7 +78,7 @@ def build_docs_setup(
         output_path: Path,
         strict: bool = True,
     ):
-        """Runs the `mkdocs build` command.
+        """Runs the `properdocs build` command.
 
         :param testproject_path: Path to test project
         :type testproject_path: Path
@@ -138,7 +138,7 @@ def setup_clean_mkdocs_folder(
 
         # Copy correct mkdocs.yml file and our test 'docs/'
         shutil.copytree("tests/fixtures/docs", testproject_path / "docs")
-        shutil.copyfile(mkdocs_yml_filepath, testproject_path / "mkdocs.yml")
+        shutil.copyfile(mkdocs_yml_filepath, testproject_path / "properdocs.yml")
 
         return testproject_path
 
@@ -174,15 +174,15 @@ def setup_clean_mkdocs_folder(
     import feedparser
 
     base = BaseTest()
-    plg_cfg = base.get_plugin_config_from_mkdocs(Path("mkdocs.yml"), "rss")
+    plg_cfg = base.get_plugin_config_from_mkdocs(Path("properdocs.yml"), "rss")
     print(type(plg_cfg))
     # truc = base.setup_clean_mkdocs_folder(
-    #     mkdocs_yml_filepath=Path("mkdocs.yml"), output_path=Path("tests/fixtures/")
+    #     mkdocs_yml_filepath=Path("properdocs.yml"), output_path=Path("tests/fixtures/")
     # )
     # print(truc)
     run_result = base.build_docs_setup(
         testproject_path="docs",
-        mkdocs_yml_filepath=Path("mkdocs.yml"),
+        mkdocs_yml_filepath=Path("properdocs.yml"),
         output_path=Path("zoubi"),
     )
     print(type(run_result), run_result.exit_code)
diff --git a/tests/test_config.py b/tests/test_config.py
index 8db2ef2..c49dfea 100644
--- a/tests/test_config.py
+++ b/tests/test_config.py
@@ -19,7 +19,7 @@
 from pathlib import Path
 
 # 3rd party
-from mkdocs.config.base import Config
+from properdocs.config.base import Config
 
 from mkdocs_rss_plugin.config import RssPluginConfig
 
diff --git a/tests/test_integrations_material.py b/tests/test_integrations_material.py
index bbf4709..8204f41 100644
--- a/tests/test_integrations_material.py
+++ b/tests/test_integrations_material.py
@@ -19,7 +19,7 @@
 from pathlib import Path
 
 # 3rd party
-from mkdocs.config import load_config
+from properdocs.config import load_config
 
 # package
 from mkdocs_rss_plugin.integrations.theme_material_base import (
diff --git a/tests/test_integrations_material_blog.py b/tests/test_integrations_material_blog.py
index a24e8ef..6fed036 100644
--- a/tests/test_integrations_material_blog.py
+++ b/tests/test_integrations_material_blog.py
@@ -22,7 +22,7 @@
 
 # 3rd party
 import feedparser
-from mkdocs.config import load_config
+from properdocs.config import load_config
 
 # package
 from mkdocs_rss_plugin.integrations.theme_material_blog_plugin import (
diff --git a/tests/test_integrations_material_social_cards.py b/tests/test_integrations_material_social_cards.py
index 5461737..97ee5a9 100644
--- a/tests/test_integrations_material_social_cards.py
+++ b/tests/test_integrations_material_social_cards.py
@@ -22,7 +22,7 @@
 
 # 3rd party
 import feedparser
-from mkdocs.config import load_config
+from properdocs.config import load_config
 
 # package
 from mkdocs_rss_plugin.__about__ import __title_clean__
diff --git a/tests/test_rss_util.py b/tests/test_rss_util.py
index b58d869..f09d165 100644
--- a/tests/test_rss_util.py
+++ b/tests/test_rss_util.py
@@ -116,7 +116,7 @@ def test_authors_invalid_type_logs_warning(self):
         page.file.abs_src_path = "docs/page.md"
         page.meta = {"authors": 42}
 
-        with self.assertLogs("mkdocs.plugins.[RSS-plugin]", "WARNING") as logs:
+        with self.assertLogs("properdocs.plugins.[RSS-plugin]", "WARNING") as logs:
             authors = self.plg_utils.get_authors_from_meta(in_page=page)
 
         self.assertIsNone(authors)