diff --git a/pandas/tests/strings/test_case_justify.py b/pandas/tests/strings/test_case_justify.py
index d6e2ca7399b4e..24e1f99ad7956 100644
--- a/pandas/tests/strings/test_case_justify.py
+++ b/pandas/tests/strings/test_case_justify.py
@@ -81,6 +81,15 @@ def test_swapcase_mixed_object():
     tm.assert_series_equal(result, expected)
 
 
+def test_casefold():
+    # GH25405
+    expected = Series(["ss", np.nan, "case", "ssd"])
+    s = Series(["ß", np.nan, "case", "ßd"])
+    result = s.str.casefold()
+
+    tm.assert_series_equal(result, expected)
+
+
 def test_casemethods(any_string_dtype):
     values = ["aaa", "bbb", "CCC", "Dddd", "eEEE"]
     s = Series(values, dtype=any_string_dtype)
diff --git a/pandas/tests/strings/test_get_dummies.py b/pandas/tests/strings/test_get_dummies.py
new file mode 100644
index 0000000000000..31386e4e342ae
--- /dev/null
+++ b/pandas/tests/strings/test_get_dummies.py
@@ -0,0 +1,53 @@
+import numpy as np
+
+from pandas import (
+    DataFrame,
+    Index,
+    MultiIndex,
+    Series,
+    _testing as tm,
+)
+
+
+def test_get_dummies(any_string_dtype):
+    s = Series(["a|b", "a|c", np.nan], dtype=any_string_dtype)
+    result = s.str.get_dummies("|")
+    expected = DataFrame([[1, 1, 0], [1, 0, 1], [0, 0, 0]], columns=list("abc"))
+    tm.assert_frame_equal(result, expected)
+
+    s = Series(["a;b", "a", 7], dtype=any_string_dtype)
+    result = s.str.get_dummies(";")
+    expected = DataFrame([[0, 1, 1], [0, 1, 0], [1, 0, 0]], columns=list("7ab"))
+    tm.assert_frame_equal(result, expected)
+
+
+def test_get_dummies_index():
+    # GH9980, GH8028
+    idx = Index(["a|b", "a|c", "b|c"])
+    result = idx.str.get_dummies("|")
+
+    expected = MultiIndex.from_tuples(
+        [(1, 1, 0), (1, 0, 1), (0, 1, 1)], names=("a", "b", "c")
+    )
+    tm.assert_index_equal(result, expected)
+
+
+def test_get_dummies_with_name_dummy(any_string_dtype):
+    # GH 12180
+    # Dummies named 'name' should work as expected
+    s = Series(["a", "b,name", "b"], dtype=any_string_dtype)
+    result = s.str.get_dummies(",")
+    expected = DataFrame([[1, 0, 0], [0, 1, 1], [0, 1, 0]], columns=["a", "b", "name"])
+    tm.assert_frame_equal(result, expected)
+
+
+def test_get_dummies_with_name_dummy_index():
+    # GH 12180
+    # Dummies named 'name' should work as expected
+    idx = Index(["a|b", "name|c", "b|name"])
+    result = idx.str.get_dummies("|")
+
+    expected = MultiIndex.from_tuples(
+        [(1, 1, 0, 0), (0, 0, 1, 1), (0, 1, 0, 1)], names=("a", "b", "c", "name")
+    )
+    tm.assert_index_equal(result, expected)
diff --git a/pandas/tests/strings/test_strings.py b/pandas/tests/strings/test_strings.py
index 80010de047cd5..42d81154dea0f 100644
--- a/pandas/tests/strings/test_strings.py
+++ b/pandas/tests/strings/test_strings.py
@@ -303,50 +303,6 @@ def test_isnumeric(any_string_dtype):
     tm.assert_series_equal(s.str.isdecimal(), Series(decimal_e, dtype=dtype))
 
 
-def test_get_dummies(any_string_dtype):
-    s = Series(["a|b", "a|c", np.nan], dtype=any_string_dtype)
-    result = s.str.get_dummies("|")
-    expected = DataFrame([[1, 1, 0], [1, 0, 1], [0, 0, 0]], columns=list("abc"))
-    tm.assert_frame_equal(result, expected)
-
-    s = Series(["a;b", "a", 7], dtype=any_string_dtype)
-    result = s.str.get_dummies(";")
-    expected = DataFrame([[0, 1, 1], [0, 1, 0], [1, 0, 0]], columns=list("7ab"))
-    tm.assert_frame_equal(result, expected)
-
-
-def test_get_dummies_index():
-    # GH9980, GH8028
-    idx = Index(["a|b", "a|c", "b|c"])
-    result = idx.str.get_dummies("|")
-
-    expected = MultiIndex.from_tuples(
-        [(1, 1, 0), (1, 0, 1), (0, 1, 1)], names=("a", "b", "c")
-    )
-    tm.assert_index_equal(result, expected)
-
-
-def test_get_dummies_with_name_dummy(any_string_dtype):
-    # GH 12180
-    # Dummies named 'name' should work as expected
-    s = Series(["a", "b,name", "b"], dtype=any_string_dtype)
-    result = s.str.get_dummies(",")
-    expected = DataFrame([[1, 0, 0], [0, 1, 1], [0, 1, 0]], columns=["a", "b", "name"])
-    tm.assert_frame_equal(result, expected)
-
-
-def test_get_dummies_with_name_dummy_index():
-    # GH 12180
-    # Dummies named 'name' should work as expected
-    idx = Index(["a|b", "name|c", "b|name"])
-    result = idx.str.get_dummies("|")
-
-    expected = MultiIndex.from_tuples(
-        [(1, 1, 0, 0), (0, 0, 1, 1), (0, 1, 0, 1)], names=("a", "b", "c", "name")
-    )
-    tm.assert_index_equal(result, expected)
-
-
 def test_join():
     values = Series(["a_b_c", "c_d_e", np.nan, "f_g_h"])
     result = values.str.split("_").str.join("_")
@@ -782,15 +738,6 @@ def test_method_on_bytes():
         lhs.str.cat(rhs)
 
 
-def test_casefold():
-    # GH25405
-    expected = Series(["ss", np.nan, "case", "ssd"])
-    s = Series(["ß", np.nan, "case", "ßd"])
-    result = s.str.casefold()
-
-    tm.assert_series_equal(result, expected)
-
-
 def test_str_accessor_in_apply_func():
     # https://github.com/pandas-dev/pandas/issues/38979
     df = DataFrame(zip("abc", "def"))