diff --git a/fuzz/fuzz_cargo_lock.py b/fuzz/fuzz_cargo_lock.py
index e4a1363aba..1b4794d0fe 100644
--- a/fuzz/fuzz_cargo_lock.py
+++ b/fuzz/fuzz_cargo_lock.py
@@ -5,9 +5,10 @@
 This module contains fuzz testing for the RustParser's handling of Cargo.lock files.
 """
 
+import os
+import shutil
 import sys
 import tempfile
-from pathlib import Path
 
 import atheris
 import atheris_libprotobuf_mutator
@@ -24,7 +25,7 @@
 logger = LOGGER.getChild("Fuzz")
 
 
-def CargoLockBuilder(data):
+def CargoLockBuilder(data, file_path):
     """
     This function converts the given data into a Cargo.lock file.
 
@@ -65,15 +66,16 @@ def CargoLockBuilder(data):
             f.write("\n")
 
 
-def TestParseData(data):
+def TestParseData(data, cve_db, logger, tmpdir):
     """
     Fuzz test the RustParser's handling of Cargo.lock files.
 
     Args:
         data (protobuf message): The protobuf message to convert to a Cargo.lock file.
     """
+    file_path = os.path.join(tmpdir, "Cargo.lock")
     try:
-        CargoLockBuilder(data)
+        CargoLockBuilder(data, file_path)
 
         rust_parser = RustParser(cve_db, logger)
         rust_parser.run_checker(file_path)
@@ -82,9 +84,19 @@ def TestParseData(data):
         return
 
 
-file_path = str(Path(tempfile.mkdtemp(prefix="cve-bin-tool-")) / "Cargo.lock")
-
-atheris_libprotobuf_mutator.Setup(
-    sys.argv, TestParseData, proto=cargo_lock_pb2.CargoLock
-)
-atheris.Fuzz()
+def main():
+    tmpdir = tempfile.mkdtemp(prefix="cve-bin-tool-")
+    try:
+        atheris_libprotobuf_mutator.Setup(
+            sys.argv,
+            lambda data: TestParseData(data, cve_db, logger, tmpdir),
+            proto=cargo_lock_pb2.CargoLock,
+        )
+        atheris.Fuzz()
+    finally:
+        if os.path.exists(tmpdir):
+            shutil.rmtree(tmpdir)
+
+
+if __name__ == "__main__":
+    main()