diff --git a/test_files/dont_touch_e501.expected.py b/test_files/dont_touch_e501.expected.py
new file mode 100644
index 0000000..4a1320e
--- /dev/null
+++ b/test_files/dont_touch_e501.expected.py
@@ -0,0 +1,5 @@
+if compat.py314:
+
+    from annotationlib import call_annotate_function  # type: ignore[import-not-found,unused-ignore]  # noqa: E501
+    from annotationlib import Format
+
diff --git a/test_files/dont_touch_e501.py b/test_files/dont_touch_e501.py
new file mode 100644
index 0000000..4a1320e
--- /dev/null
+++ b/test_files/dont_touch_e501.py
@@ -0,0 +1,5 @@
+if compat.py314:
+
+    from annotationlib import call_annotate_function  # type: ignore[import-not-found,unused-ignore]  # noqa: E501
+    from annotationlib import Format
+
diff --git a/tests.py b/tests.py
index c5ba3c5..1981811 100644
--- a/tests.py
+++ b/tests.py
@@ -110,6 +110,9 @@ def test_empty_file(self):
     def test_conditional_imports(self):
         self._assert_file("conditional_imports.py")
 
+    def test_dont_touch_e501(self):
+        self._assert_file("dont_touch_e501.py", opts=["--black-line-length", "79"],)
+
     def test_sqla_test_file(self):
         self._assert_file("sqla_test_file.py")
 
diff --git a/zimports/zimports.py b/zimports/zimports.py
index a60516b..954d49c 100644
--- a/zimports/zimports.py
+++ b/zimports/zimports.py
@@ -800,7 +800,7 @@ def _lines_with_newlines(lines) -> Iterator[str]:
 
 def _mini_black_format(lines: list[str], line_length) -> Iterator[str]:
     for line in lines:
-        if len(line) >= line_length:
+        if len(line) >= line_length and not re.search(r"noqa.*E501", line):
             from_imp_match = re.match(r"^(\s*)from (.+?) import (.+)", line)
             if not from_imp_match:
                 yield line