diff --git a/pandas/tests/copy_view/test_functions.py b/pandas/tests/copy_view/test_functions.py
index 56e4b186350f2..3db78063172ba 100644
--- a/pandas/tests/copy_view/test_functions.py
+++ b/pandas/tests/copy_view/test_functions.py
@@ -3,7 +3,6 @@
 
 from pandas import (
     DataFrame,
-    Index,
     Series,
     concat,
     merge,
@@ -310,87 +309,4 @@ def test_merge_copy_keyword(using_copy_on_write, copy):
         assert np.shares_memory(get_array(df2, "b"), get_array(result, "b"))
     else:
         assert not np.shares_memory(get_array(df, "a"), get_array(result, "a"))
-        assert not np.shares_memory(get_array(df2, "b"), get_array(result, "b"))
-
-
-def test_join_on_key(using_copy_on_write):
-    df_index = Index(["a", "b", "c"], name="key")
-
-    df1 = DataFrame({"a": [1, 2, 3]}, index=df_index.copy(deep=True))
-    df2 = DataFrame({"b": [4, 5, 6]}, index=df_index.copy(deep=True))
-
-    df1_orig = df1.copy()
-    df2_orig = df2.copy()
-
-    result = df1.join(df2, on="key")
-
-    if using_copy_on_write:
-        assert np.shares_memory(get_array(result, "a"), get_array(df1, "a"))
-        assert np.shares_memory(get_array(result, "b"), get_array(df2, "b"))
-        assert np.shares_memory(get_array(result.index), get_array(df1.index))
-        assert not np.shares_memory(get_array(result.index), get_array(df2.index))
-    else:
-        assert not np.shares_memory(get_array(result, "a"), get_array(df1, "a"))
-        assert not np.shares_memory(get_array(result, "b"), get_array(df2, "b"))
-
-    result.iloc[0, 0] = 0
-    if using_copy_on_write:
-        assert not np.shares_memory(get_array(result, "a"), get_array(df1, "a"))
-        assert np.shares_memory(get_array(result, "b"), get_array(df2, "b"))
-
-    result.iloc[0, 1] = 0
-    if using_copy_on_write:
-        assert not np.shares_memory(get_array(result, "b"), get_array(df2, "b"))
-
-    tm.assert_frame_equal(df1, df1_orig)
-    tm.assert_frame_equal(df2, df2_orig)
-
-
-def test_join_multiple_dataframes_on_key(using_copy_on_write):
-    df_index = Index(["a", "b", "c"], name="key")
-
-    df1 = DataFrame({"a": [1, 2, 3]}, index=df_index.copy(deep=True))
-    dfs_list = [
-        DataFrame({"b": [4, 5, 6]}, index=df_index.copy(deep=True)),
-        DataFrame({"c": [7, 8, 9]}, index=df_index.copy(deep=True)),
-    ]
-
-    df1_orig = df1.copy()
-    dfs_list_orig = [df.copy() for df in dfs_list]
-
-    result = df1.join(dfs_list)
-
-    if using_copy_on_write:
-        assert np.shares_memory(get_array(result, "a"), get_array(df1, "a"))
-        assert np.shares_memory(get_array(result, "b"), get_array(dfs_list[0], "b"))
-        assert np.shares_memory(get_array(result, "c"), get_array(dfs_list[1], "c"))
-        assert np.shares_memory(get_array(result.index), get_array(df1.index))
-        assert not np.shares_memory(
-            get_array(result.index), get_array(dfs_list[0].index)
-        )
-        assert not np.shares_memory(
-            get_array(result.index), get_array(dfs_list[1].index)
-        )
-    else:
-        assert not np.shares_memory(get_array(result, "a"), get_array(df1, "a"))
-        assert not np.shares_memory(get_array(result, "b"), get_array(dfs_list[0], "b"))
-        assert not np.shares_memory(get_array(result, "c"), get_array(dfs_list[1], "c"))
-
-    result.iloc[0, 0] = 0
-    if using_copy_on_write:
-        assert not np.shares_memory(get_array(result, "a"), get_array(df1, "a"))
-        assert np.shares_memory(get_array(result, "b"), get_array(dfs_list[0], "b"))
-        assert np.shares_memory(get_array(result, "c"), get_array(dfs_list[1], "c"))
-
-    result.iloc[0, 1] = 0
-    if using_copy_on_write:
-        assert not np.shares_memory(get_array(result, "b"), get_array(dfs_list[0], "b"))
-        assert np.shares_memory(get_array(result, "c"), get_array(dfs_list[1], "c"))
-
-    result.iloc[0, 2] = 0
-    if using_copy_on_write:
-        assert not np.shares_memory(get_array(result, "c"), get_array(dfs_list[1], "c"))
-
-    tm.assert_frame_equal(df1, df1_orig)
-    for df, df_orig in zip(dfs_list, dfs_list_orig):
-        tm.assert_frame_equal(df, df_orig)
+        assert not np.shares_memory(get_array(df2, "b"), get_array(result, "b"))
\ No newline at end of file