diff --git a/tests/formatting/string_in.blp b/tests/formatting/string_in.blp
new file mode 100644
index 0000000..451d879
--- /dev/null
+++ b/tests/formatting/string_in.blp
@@ -0,0 +1,5 @@
+using Gtk 4.0;
+
+Label {
+  label: "\"'\'\t\n\\'";
+}
diff --git a/tests/formatting/string_out.blp b/tests/formatting/string_out.blp
new file mode 100644
index 0000000..990d344
--- /dev/null
+++ b/tests/formatting/string_out.blp
@@ -0,0 +1,5 @@
+using Gtk 4.0;
+
+Label {
+  label: '"\'\'\t\n\\\'';
+}
diff --git a/tests/test_formatter.py b/tests/test_formatter.py
index 8d03805..c76f740 100644
--- a/tests/test_formatter.py
+++ b/tests/test_formatter.py
@@ -45,3 +45,4 @@ class TestFormatter(unittest.TestCase):
         self.assert_format_test("in1.blp", "out.blp")
         self.assert_format_test("in2.blp", "out.blp")
         self.assert_format_test("correct1.blp", "correct1.blp")
+        self.assert_format_test("string_in.blp", "string_out.blp")