diff --git a/crates/ruff_linter/resources/test/fixtures/ruff/RUF026.py b/crates/ruff_linter/resources/test/fixtures/ruff/RUF026.py
index c607b8b1b3..384d005e9f 100644
--- a/crates/ruff_linter/resources/test/fixtures/ruff/RUF026.py
+++ b/crates/ruff_linter/resources/test/fixtures/ruff/RUF026.py
@@ -118,3 +118,10 @@ def func():
         return lambda: value
 
     defaultdict(constant_factory("<missing>"))
+
+def func():
+    defaultdict(default_factory=t"")  # OK
+
+
+def func():
+    defaultdict(default_factory=t"hello")  # OK
diff --git a/crates/ruff_linter/src/rules/ruff/rules/default_factory_kwarg.rs b/crates/ruff_linter/src/rules/ruff/rules/default_factory_kwarg.rs
index 355aa47519..61f4b3119f 100644
--- a/crates/ruff_linter/src/rules/ruff/rules/default_factory_kwarg.rs
+++ b/crates/ruff_linter/src/rules/ruff/rules/default_factory_kwarg.rs
@@ -123,7 +123,8 @@ fn is_non_callable_value(value: &Expr) -> bool {
             | Expr::SetComp(_)
             | Expr::DictComp(_)
             | Expr::Generator(_)
-            | Expr::FString(_))
+            | Expr::FString(_)
+            | Expr::TString(_))
 }
 
 /// Generate an [`Expr`] to replace `defaultdict(default_factory=callable)` with