From 1d0f834701691dbf3f3d81cee39e7467fe96a19c Mon Sep 17 00:00:00 2001
From: jw9829 <245427686+jw9829@users.noreply.github.com>
Date: Mon, 12 Oct 2026 15:16:10 -0400
Subject: [PATCH] Fix t-string dependency for older targets

---
 mypy/build.py                       | 2 +-
 test-data/unit/check-python314.test | 4 ++++
 2 files changed, 5 insertions(+), 1 deletion(-)

diff --git a/mypy/build.py b/mypy/build.py
index 09952f37aa280..78bd732793c22 100644
--- a/mypy/build.py
+++ b/mypy/build.py
@@ -3444,7 +3444,7 @@ def compute_dependencies(self) -> None:
         # Every module implicitly depends on builtins.
         if self.id != "builtins":
             self.add_dependency("builtins")
-        if self.tree.uses_template_strings:
+        if self.tree.uses_template_strings and self.options.python_version >= (3, 14):
             self.add_dependency("string.templatelib")
 
         self.check_blockers()  # Can fail due to bogus relative imports
diff --git a/test-data/unit/check-python314.test b/test-data/unit/check-python314.test
index c6944013c1d83..e7e7e790acd3b 100644
--- a/test-data/unit/check-python314.test
+++ b/test-data/unit/check-python314.test
@@ -14,6 +14,10 @@ a = t"foobar"
 a = t"{'foobar'}"
 [builtins fixtures/f_string.pyi]
 
+[case testTemplateStringBelowTargetDoesNotImportTemplatelib]
+# flags: --python-version=3.13 --native-parser
+t"hello {1}"  # E: T-strings: requires Python 3.14 or newer (current target: Python 3.13)
+
 [case testTemplateStringWithoutExplicitImport]
 reveal_type(t"implicit import works")  # N: Revealed type is "string.templatelib.Template"
 [builtins fixtures/f_string.pyi]