diff --git a/changelog/1231.fixed.md b/changelog/1231.fixed.md
new file mode 100644
index 000000000..c845fa9f4
--- /dev/null
+++ b/changelog/1231.fixed.md
@@ -0,0 +1 @@
+Register the `infrahub_integration` pytest marker under its real name. It was registered as `infrahub_integraton`, so integration tests raised a `PytestUnknownMarkWarning` on every run and failed to collect under `--strict-markers`.
diff --git a/infrahub_sdk/pytest_plugin/plugin.py b/infrahub_sdk/pytest_plugin/plugin.py
index 258e7f9c8..aa5f79824 100644
--- a/infrahub_sdk/pytest_plugin/plugin.py
+++ b/infrahub_sdk/pytest_plugin/plugin.py
@@ -100,7 +100,7 @@ def pytest_configure(config: pytest.Config) -> None:
     config.addinivalue_line("markers", "infrahub_unit: Unit test for an Infrahub resource, works without dependencies")
     config.addinivalue_line(
         "markers",
-        "infrahub_integraton: Integation test for an Infrahub resource, depends on an Infrahub running instance",
+        "infrahub_integration: Integration test for an Infrahub resource, depends on an Infrahub running instance",
     )
     config.addinivalue_line("markers", "infrahub_check: Test related to an Infrahub Check")
     config.addinivalue_line("markers", "infrahub_graphql_query: Test related to an Infrahub GraphQL query")
diff --git a/pyproject.toml b/pyproject.toml
index 46f9d5333..0bd7f27e2 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -117,7 +117,7 @@ filterwarnings = [
     "ignore:Module already imported so cannot be rewritten",
     "ignore:Deprecated call to",
 ]
-addopts = "-vs --cov-report term-missing --cov-report xml --dist loadscope"
+addopts = "-vs --strict-markers --cov-report term-missing --cov-report xml --dist loadscope"
 
 [tool.ty]
 
diff --git a/tests/unit/pytest_plugin/test_plugin.py b/tests/unit/pytest_plugin/test_plugin.py
index 01fa38ac7..7a1b5db4c 100644
--- a/tests/unit/pytest_plugin/test_plugin.py
+++ b/tests/unit/pytest_plugin/test_plugin.py
@@ -1,5 +1,7 @@
 import pytest
 
+from infrahub_sdk.pytest_plugin.loader import MARKER_MAPPING
+
 
 def test_help_message(pytester: pytest.Pytester) -> None:
     """Make sure that the plugin is loaded by capturing an option it adds in the help message."""
@@ -28,6 +30,72 @@ def test_emptyconfig(pytester: pytest.Pytester) -> None:
     result.assert_outcomes()
 
 
+def test_resource_markers_are_registered(pytester: pytest.Pytester) -> None:
+    """The resource markers are built when the loader is imported, before a config exists.
+
+    `--strict-markers` only validates a marker created once a config is attached, so it never sees
+    these. Compare them against the registered list instead.
+    """
+    result = pytester.runpytest("--markers")
+
+    registered = {
+        line.removeprefix("@pytest.mark.").split(":")[0].split("(")[0]
+        for line in result.stdout.lines
+        if line.startswith("@pytest.mark.")
+    }
+    missing = {mark.markname for mark in MARKER_MAPPING.values()} - registered
+
+    assert not missing, f"markers applied by the loader but never registered: {sorted(missing)}"
+
+
+def test_type_markers_are_registered(pytester: pytest.Pytester) -> None:
+    """The type markers are applied during collection, so --strict-markers rejects an unregistered one."""
+    pytester.makefile(
+        ".yml",
+        test_markers="""
+        ---
+        version: "1.0"
+        infrahub_tests:
+          - resource: "Jinja2Transform"
+            resource_name: "bgp_config"
+            tests:
+              - name: "smoke"
+                spec:
+                  kind: "jinja2-transform-smoke"
+              - name: "unit"
+                spec:
+                  kind: "jinja2-transform-unit-render"
+              - name: "integration"
+                spec:
+                  kind: "jinja2-transform-integration"
+                  variables: {}
+    """,
+    )
+    pytester.makefile(
+        ".yml",
+        infrahub_config="""
+        ---
+        jinja2_transforms:
+          - name: bgp_config
+            description: "Template for BGP config base"
+            query: "bgp_sessions"
+            template_path: "templates/bgp_config.j2"
+    """,
+    )
+    pytester.makefile(".json", input="{}")
+
+    result = pytester.runpytest("--infrahub-repo-config=infrahub_config.yml", "--strict-markers", "--collect-only")
+
+    assert result.ret == pytest.ExitCode.OK
+    result.stdout.fnmatch_lines(
+        [
+            "*infrahub_jinja2_transform__bgp_config__smoke*",
+            "*infrahub_jinja2_transform__bgp_config__unit*",
+            "*infrahub_jinja2_transform__bgp_config__integration*",
+        ]
+    )
+
+
 def test_jinja2_transform_config_missing_directory(pytester: pytest.Pytester) -> None:
     """Make sure tests raise errors if directories are not found."""
     pytester.makefile(