diff --git a/tests/unit/wrapper/core/test_kernel_builder.py b/tests/unit/wrapper/core/test_kernel_builder.py
index 4135180..8996aaa 100644
--- a/tests/unit/wrapper/core/test_kernel_builder.py
+++ b/tests/unit/wrapper/core/test_kernel_builder.py
@@ -2,6 +2,7 @@
 from pathlib import Path
 
 from builder.core import KernelBuilder
+from builder.managers import ResourceManager
 
 
 @pytest.mark.parametrize(
@@ -23,7 +24,7 @@
 )
 def test__defconfig__check(config: dict[str, str], expected_defconfig: Path) -> None:
     """Test defconfig path definition."""
-    t = KernelBuilder(**config)
+    t = KernelBuilder(**config, rm=ResourceManager())
     res_actual = t._defconfig
     res_expected = expected_defconfig
     assert res_actual == res_expected