diff --git a/pandas/tests/series/test_npfuncs.py b/pandas/tests/series/test_npfuncs.py
index 6a575ab85943a..548fd7d2c469c 100644
--- a/pandas/tests/series/test_npfuncs.py
+++ b/pandas/tests/series/test_npfuncs.py
@@ -3,10 +3,8 @@
 """
 
 import numpy as np
-import pytest
 
 from pandas import Series
-import pandas._testing as tm
 
 
 class TestPtp:
@@ -20,16 +18,4 @@ def test_ptp(self):
 
 def test_numpy_unique(datetime_series):
     # it works!
-    np.unique(datetime_series)
-
-
-@pytest.mark.parametrize("index", [["a", "b", "c", "d", "e"], None])
-def test_numpy_argwhere(index):
-    # GH#35331
-
-    s = Series(range(5), index=index, dtype=np.int64)
-
-    result = np.argwhere(s > 2).astype(np.int64)
-    expected = np.array([[3], [4]], dtype=np.int64)
-
-    tm.assert_numpy_array_equal(result, expected)
+    np.unique(datetime_series)
\ No newline at end of file