diff --git a/tests/test_internals_urls.py b/tests/test_internals_urls.py
index fc7b0313..24fa745d 100644
--- a/tests/test_internals_urls.py
+++ b/tests/test_internals_urls.py
@@ -9,7 +9,7 @@ def ds():
 
 
 @pytest.mark.parametrize(
-    "base_url,path,expected",
+    "ds_base_url,path,expected",
     [
         ("/", "/", "/"),
         ("/", "/foo", "/foo"),
@@ -20,8 +20,8 @@ def ds():
         ("/data/", "/data/foo", "/data/data/foo"),
     ],
 )
-def test_path(ds, base_url, path, expected):
-    ds._settings["base_url"] = base_url
+def test_path(ds, ds_base_url, path, expected):
+    ds._settings["base_url"] = ds_base_url
     actual = ds.urls.path(path)
     assert actual == expected
     assert isinstance(actual, PrefixedUrlString)
@@ -36,35 +36,35 @@ def test_path_applied_twice_does_not_double_prefix(ds):
 
 
 @pytest.mark.parametrize(
-    "base_url,expected",
+    "ds_base_url,expected",
     [
         ("/", "/"),
         ("/prefix/", "/prefix/"),
     ],
 )
-def test_instance(ds, base_url, expected):
-    ds._settings["base_url"] = base_url
+def test_instance(ds, ds_base_url, expected):
+    ds._settings["base_url"] = ds_base_url
     actual = ds.urls.instance()
     assert actual == expected
     assert isinstance(actual, PrefixedUrlString)
 
 
 @pytest.mark.parametrize(
-    "base_url,file,expected",
+    "ds_base_url,file,expected",
     [
         ("/", "foo.js", "/-/static/foo.js"),
         ("/prefix/", "foo.js", "/prefix/-/static/foo.js"),
     ],
 )
-def test_static(ds, base_url, file, expected):
-    ds._settings["base_url"] = base_url
+def test_static(ds, ds_base_url, file, expected):
+    ds._settings["base_url"] = ds_base_url
     actual = ds.urls.static(file)
     assert actual == expected
     assert isinstance(actual, PrefixedUrlString)
 
 
 @pytest.mark.parametrize(
-    "base_url,plugin,file,expected",
+    "ds_base_url,plugin,file,expected",
     [
         (
             "/",
@@ -80,44 +80,44 @@ def test_static(ds, base_url, file, expected):
         ),
     ],
 )
-def test_static_plugins(ds, base_url, plugin, file, expected):
-    ds._settings["base_url"] = base_url
+def test_static_plugins(ds, ds_base_url, plugin, file, expected):
+    ds._settings["base_url"] = ds_base_url
     actual = ds.urls.static_plugins(plugin, file)
     assert actual == expected
     assert isinstance(actual, PrefixedUrlString)
 
 
 @pytest.mark.parametrize(
-    "base_url,expected",
+    "ds_base_url,expected",
     [
         ("/", "/-/logout"),
         ("/prefix/", "/prefix/-/logout"),
     ],
 )
-def test_logout(ds, base_url, expected):
-    ds._settings["base_url"] = base_url
+def test_logout(ds, ds_base_url, expected):
+    ds._settings["base_url"] = ds_base_url
     actual = ds.urls.logout()
     assert actual == expected
     assert isinstance(actual, PrefixedUrlString)
 
 
 @pytest.mark.parametrize(
-    "base_url,format,expected",
+    "ds_base_url,format,expected",
     [
         ("/", None, "/_memory"),
         ("/prefix/", None, "/prefix/_memory"),
         ("/", "json", "/_memory.json"),
     ],
 )
-def test_database(ds, base_url, format, expected):
-    ds._settings["base_url"] = base_url
+def test_database(ds, ds_base_url, format, expected):
+    ds._settings["base_url"] = ds_base_url
     actual = ds.urls.database("_memory", format=format)
     assert actual == expected
     assert isinstance(actual, PrefixedUrlString)
 
 
 @pytest.mark.parametrize(
-    "base_url,name,format,expected",
+    "ds_base_url,name,format,expected",
     [
         ("/", "name", None, "/_memory/name"),
         ("/prefix/", "name", None, "/prefix/_memory/name"),
@@ -125,8 +125,8 @@ def test_database(ds, base_url, format, expected):
         ("/", "name.json", "json", "/_memory/name~2Ejson.json"),
     ],
 )
-def test_table_and_query(ds, base_url, name, format, expected):
-    ds._settings["base_url"] = base_url
+def test_table_and_query(ds, ds_base_url, name, format, expected):
+    ds._settings["base_url"] = ds_base_url
     actual1 = ds.urls.table("_memory", name, format=format)
     assert actual1 == expected
     assert isinstance(actual1, PrefixedUrlString)
@@ -136,15 +136,15 @@ def test_table_and_query(ds, base_url, name, format, expected):
 
 
 @pytest.mark.parametrize(
-    "base_url,format,expected",
+    "ds_base_url,format,expected",
     [
         ("/", None, "/_memory/facetable/1"),
         ("/prefix/", None, "/prefix/_memory/facetable/1"),
         ("/", "json", "/_memory/facetable/1.json"),
     ],
 )
-def test_row(ds, base_url, format, expected):
-    ds._settings["base_url"] = base_url
+def test_row(ds, ds_base_url, format, expected):
+    ds._settings["base_url"] = ds_base_url
     actual = ds.urls.row("_memory", "facetable", "1", format=format)
     assert actual == expected
     assert isinstance(actual, PrefixedUrlString)