diff --git a/dmoj/graders/base.py b/dmoj/graders/base.py
index 96e32fc59..29840e311 100644
--- a/dmoj/graders/base.py
+++ b/dmoj/graders/base.py
@@ -11,7 +11,6 @@ def __init__(self, judge, problem, language, source):
         self.binary = self._generate_binary()
         self.run_pretests_only = self.problem.meta.pretests_only
         self._abort_requested = False
-        self._current_proc = None
         self._batch_counter = 0
         self._testcase_counter = 0
 
diff --git a/dmoj/graders/bridged.py b/dmoj/graders/bridged.py
index c30eb3da9..0defaa8c8 100644
--- a/dmoj/graders/bridged.py
+++ b/dmoj/graders/bridged.py
@@ -46,7 +46,7 @@ def check_result(self, case, result):
     def _launch_process(self, case):
         self._interactor_stdin_pipe, submission_stdout_pipe = os.pipe()
         submission_stdin_pipe, self._interactor_stdout_pipe = os.pipe()
-        self._current_proc = self.binary.launch(
+        self.binary.launch(
             time=self.problem.time_limit,
             memory=self.problem.memory_limit,
             symlinks=case.config.symlinks,
diff --git a/dmoj/graders/standard.py b/dmoj/graders/standard.py
index ab3bd2925..d093a0614 100644
--- a/dmoj/graders/standard.py
+++ b/dmoj/graders/standard.py
@@ -76,7 +76,7 @@ def check_result(self, case, result):
         return check
 
     def _launch_process(self, case):
-        self._current_proc = self.binary.launch(
+        self.binary.launch(
             time=self.problem.time_limit,
             memory=self.problem.memory_limit,
             symlinks=case.config.symlinks,