Corrected test modification

Author: rhshadrach

pandas/tests/plotting/test_groupby.py

@@ -75,7 +75,7 @@ def test_groupby_hist_with_legend(self, column, expected_axes_num, label):
         expected_layout = (1, expected_axes_num)
         expected_labels = label or column or [["a"], ["b"]]
 
-        index = Index(15 * [1] + 15 * [2], name="c")
+        index = Index(15 * ["1"] + 15 * ["2"], name="c")
         df = DataFrame(np.random.randn(30, 2), index=index, columns=["a", "b"])
         g = df.groupby("c")
 
@@ -99,10 +99,8 @@ def test_groupby_hist_with_legend(self, column, expected_axes_num, label):
     def test_groupby_hist_series_with_legend(self, label, expected_label):
         # GH 6279
         # Histogram can have a legend
-        index = Index(15 * [1] + 15 * [2], name="c")
+        index = Index(15 * ["1"] + 15 * ["2"], name="c")
         df = DataFrame(np.random.randn(30, 2), index=index, columns=["a", "b"])
-        # older version of matplotlib fails if labels are not strings
-        df = df.astype(str)
         g = df.groupby("c")
 
         kwargs = {"legend": True}

pandas/tests/plotting/test_hist_method.py

@@ -138,7 +138,7 @@ def test_hist_with_legend(
     ):
         # GH 6279
         # Histogram can have a legend
-        index = 15 * [1] + 15 * [2]
+        index = 15 * ["1"] + 15 * ["2"]
         s = Series(np.random.randn(30), index=index, name="a")
         s.index.name = "b"
 
@@ -327,7 +327,7 @@ def test_hist_with_legend(self, by, column, label):
         if by is not None:
             expected_labels = [expected_labels] * 2
 
-        index = Index(15 * [1] + 15 * [2], name="c")
+        index = Index(15 * ["1"] + 15 * ["2"], name="c")
         df = DataFrame(np.random.randn(30, 2), index=index, columns=["a", "b"])
 
         kwargs = {"legend": True, "by": by, "column": column}