Prevent test filename clashes when running tests in parallel

tests/suite/modules/io_related/test_marshal.py

@@ -108,15 +108,16 @@ def test_file_multiple_reads(self):
             l.append(marshal.dumps({i:i}))
 
         data = b''.join(l)
-        with open('tempfile.txt', 'wb') as f:
+        tmpfile = os.path.join(self.temporary_dir, 'tempfile_%d.txt' % os.getpid())
+        with open(tmpfile, 'wb') as f:
             f.write(data)
 
-        with open('tempfile.txt', 'rb') as f:
+        with open(tmpfile, 'rb') as f:
             for i in range(10):
                 obj = marshal.load(f)
                 self.assertEqual(obj, {i:i})
 
-        self.delete_files('tempfile.txt')
+        self.delete_files(tmpfile)
 
     def test_string_interning(self):
         self.assertEqual(marshal.dumps(['abc', 'abc'], 0), b'[\x02\x00\x00\x00u\x03\x00\x00\x00abcu\x03\x00\x00\x00abc')

tests/suite/modules/misc/test_zlib.py

@@ -11,11 +11,11 @@
 
 from iptest import IronPythonTestCase, run_test
 
-def create_gzip(text):
+def create_gzip(text, path):
     import gzip
-    with gzip.open('test_data.gz', 'wb') as f:
+    with gzip.open(path, 'wb') as f:
         f.write(text)
-    with open('test_data.gz', 'rb') as f:
+    with open(path, 'rb') as f:
         gzip_compress = f.read()
     return gzip_compress
 
@@ -48,11 +48,12 @@ def setUp(self):
         zlib_compress = zlib.compressobj(9, zlib.DEFLATED, zlib.MAX_WBITS)
         self.deflate_data = deflate_compress.compress(self.text) + deflate_compress.flush()
         self.zlib_data = zlib_compress.compress(self.text) + zlib_compress.flush()
-        self.gzip_data = create_gzip(self.text)
+        self.gzip_file = os.path.join(self.temporary_dir, "test_data_%d.gz" % os.getpid())
+        self.gzip_data = create_gzip(self.text, self.gzip_file)
 
     def tearDown(self):
         super(ZlibTest, self).tearDown()
-        os.remove("test_data.gz")
+        os.remove(self.gzip_file)
 
     def test_gzip(self):
         """decompression with gzip header"""