diff --git a/panda/tests/unit/test_diagnostic_requests.py b/panda/tests/unit/test_diagnostic_requests.py
index 7c5488f5fe..5732d7154a 100644
--- a/panda/tests/unit/test_diagnostic_requests.py
+++ b/panda/tests/unit/test_diagnostic_requests.py
@@ -7,7 +7,7 @@ from panda import Panda, McuType
 
 @pytest.mark.parametrize('mcu', (McuType.F4, McuType.H7))
 @pytest.mark.parametrize('version', ('DEV-source-DEBUG', 'DEV-source-DEBUG-FAULTTEST'))
-@pytest.mark.parametrize('method,arguments,request,h7', (
+@pytest.mark.parametrize('method,arguments,opcode,h7', (
   ('inject_fault', (2,), 0xea, False),
   ('inject_hardfault', (), 0xeb, False),
   ('inject_nmi', (), 0xec, False),
@@ -17,7 +17,7 @@ from panda import Panda, McuType
   ('inject_self_test_failure', (2,), 0xed, True),
   ('inject_readback_fault', (2,), 0xe9, True),
 ))
-def test_diagnostic_requests_require_dedicated_bench_firmware(mcu, version, method, arguments, request, h7):
+def test_diagnostic_requests_require_dedicated_bench_firmware(mcu, version, method, arguments, opcode, h7):
   panda = object.__new__(Panda)
   panda._handle = Mock()
   panda.get_mcu_type = lambda: mcu
@@ -33,9 +33,9 @@ def test_diagnostic_requests_require_dedicated_bench_firmware(mcu, version, meth
     panda._handle.controlWrite.assert_not_called()
   else:
     getattr(panda, method)(*arguments)
-    assert request != 0xf5
+    assert opcode != 0xf5
     panda._handle.controlWrite.assert_called_once()
-    assert panda._handle.controlWrite.call_args.args[1] == request
+    assert panda._handle.controlWrite.call_args.args[1] == opcode
 
 
 def test_body_does_not_claim_fault_injection_capability():
@@ -59,7 +59,7 @@ def test_body_does_not_claim_fault_injection_capability():
 def test_build_requires_explicit_debug_fault_injection(monkeypatch, release, injection, expected):
   import ast
   from pathlib import Path
-  from SCons.Script import File
+  from SCons.Node.FS import FS
 
   root = Path(__file__).resolve().parents[2]
   source = root / 'SConscript'
@@ -75,7 +75,9 @@ def test_build_requires_explicit_debug_fault_injection(monkeypatch, release, inj
     monkeypatch.delenv('RELEASE', raising=False)
   monkeypatch.setenv('CERT', str(root / 'board/crypto/certs/debug'))
   monkeypatch.setenv('PANDA_FAULT_INJECTION', injection)
-  namespace = {'File': File}
+  filesystem = FS(str(root))
+  filesystem.set_SConstruct_dir(filesystem.Dir('.'))
+  namespace = {'File': filesystem.File}
   code = compile(ast.Module(body=prefix, type_ignores=[]), str(source), 'exec')
   if expected is None:
     with pytest.raises(ValueError):