diff --git a/support/testing/tests/package/test_ddrescue.py b/support/testing/tests/package/test_ddrescue.py
index eb3f63ae53..bd34694737 100644
--- a/support/testing/tests/package/test_ddrescue.py
+++ b/support/testing/tests/package/test_ddrescue.py
@@ -10,8 +10,10 @@ class TestDdrescue(infra.basetest.BRTest):
     #   mapper dm-dust, which are used to simulate a failing storage
     #   block device.
     # - lvm2 user space package is needed to configure dm-dust with dmsetup
+    kernel_fragment = \
+        infra.filepath("tests/package/test_ddrescue/linux-ddrescue.fragment")
     config = \
-        """
+        f"""
         BR2_aarch64=y
         BR2_TOOLCHAIN_EXTERNAL=y
         BR2_TARGET_GENERIC_GETTY_PORT="ttyAMA0"
@@ -20,16 +22,14 @@ class TestDdrescue(infra.basetest.BRTest):
         BR2_LINUX_KERNEL_CUSTOM_VERSION_VALUE="6.18.2"
         BR2_LINUX_KERNEL_USE_CUSTOM_CONFIG=y
         BR2_LINUX_KERNEL_CUSTOM_CONFIG_FILE="board/qemu/aarch64-virt/linux.config"
-        BR2_LINUX_KERNEL_CONFIG_FRAGMENT_FILES="{}"
+        BR2_LINUX_KERNEL_CONFIG_FRAGMENT_FILES="{kernel_fragment}"
         BR2_LINUX_KERNEL_NEEDS_HOST_OPENSSL=y
         BR2_PACKAGE_DDRESCUE=y
         BR2_PACKAGE_LVM2=y
         BR2_TARGET_ROOTFS_CPIO=y
         BR2_TARGET_ROOTFS_CPIO_GZIP=y
         # BR2_TARGET_ROOTFS_TAR is not set
-        """.format(
-            infra.filepath("tests/package/test_ddrescue/linux-ddrescue.fragment")
-        )
+        """
 
     def test_run(self):
         img = os.path.join(self.builddir, "images", "rootfs.cpio.gz")