diff --git a/tests/smoke_test/test_basic.py b/tests/smoke_test/test_basic.py
index 9e466e198..615695ff4 100644
--- a/tests/smoke_test/test_basic.py
+++ b/tests/smoke_test/test_basic.py
@@ -76,3 +76,11 @@ def test_systemctl_status(shell):
 def test_systemctl_check_no_failed(shell):
     output = shell.run_check("systemctl --no-pager -l list-units --state=failed")
     assert "0 loaded units listed." in output, f"Some units failed:\n{"\n".join(output)}"
+
+
+@pytest.mark.dependency(depends=["test_init"])
+def test_kernel_not_tainted(shell):
+    """Check if the kernel is not tainted - do it at the end of the
+    test suite to increase the chance of catching issues."""
+    output = shell.run_check("cat /proc/sys/kernel/tainted")
+    assert output == "0\n", f"Kernel tainted: {output}"
diff --git a/tests/supervisor_test/test_supervisor.py b/tests/supervisor_test/test_supervisor.py
index c7621ea4f..92623e327 100644
--- a/tests/supervisor_test/test_supervisor.py
+++ b/tests/supervisor_test/test_supervisor.py
@@ -190,3 +190,11 @@ def test_restore_ssl_directory(shell_json, stash):
     result = shell_json(f"ha backups restore {stash.get('slug')} --folders ssl --no-progress --raw-json")
     assert result.get("result") == "ok", f"Backup restore failed: {result}"
     logger.info("Backup restore result: %s", result)
+
+
+@pytest.mark.dependency(depends=["test_start_supervisor"])
+def test_kernel_not_tainted(shell):
+    """Check if the kernel is not tainted - do it at the end of the
+    test suite to increase the chance of catching issues."""
+    output = shell.run_check("cat /proc/sys/kernel/tainted")
+    assert output == "0\n", f"Kernel tainted: {output}"