diff --git a/isort/wrap_modes.py b/isort/wrap_modes.py
index b7b22f000..ccfc1cd5a 100644
--- a/isort/wrap_modes.py
+++ b/isort/wrap_modes.py
@@ -60,11 +60,11 @@ def grid(**interface):
             len(next_statement.split(interface["line_separator"])[-1]) + 1
             > interface["line_length"]
         ):
-            lines = [f"{white_space}{next_import.split(' ')[0]}"]
+            lines = [f"{interface['white_space']}{next_import.split(' ')[0]}"]
             for part in next_import.split(" ")[1:]:
                 new_line = f"{lines[-1]} {part}"
                 if len(new_line) + 1 > interface["line_length"]:
-                    lines.append(f"{white_space}{part}")
+                    lines.append(f"{interface['white_space']}{part}")
                 else:
                     lines[-1] = new_line
             next_import = interface["line_separator"].join(lines)
diff --git a/tests/unit/test_wrap_modes.py b/tests/unit/test_wrap_modes.py
index 7d6fbb0c7..c95a75136 100644
--- a/tests/unit/test_wrap_modes.py
+++ b/tests/unit/test_wrap_modes.py
@@ -73,16 +73,24 @@ def test_backslash_grid():
     """Tests the backslash_grid grid wrap mode, ensuring it matches formatting expectations.
     See: https://github.com/PyCQA/isort/issues/1434
     """
-    assert isort.code("""
+    assert (
+        isort.code(
+            """
 from kopf.engines import loggers, posting
 from kopf.reactor import causation, daemons, effects, handling, lifecycles, registries
 from kopf.storage import finalizers, states
 from kopf.structs import (bodies, configuration, containers, diffs,
                           handlers as handlers_, patches, resources)
-""", multi_line_output=11, line_length=88, combine_as_imports=True) == """
+""",
+            multi_line_output=11,
+            line_length=88,
+            combine_as_imports=True,
+        )
+        == """
 from kopf.engines import loggers, posting
 from kopf.reactor import causation, daemons, effects, handling, lifecycles, registries
 from kopf.storage import finalizers, states
 from kopf.structs import bodies, configuration, containers, diffs, \\
                          handlers as handlers_, patches, resources
 """
+    )