diff --git a/tests/third_party/scipy/line_search_test.py b/tests/third_party/scipy/line_search_test.py
index 9b2480053..5a22372b7 100644
--- a/tests/third_party/scipy/line_search_test.py
+++ b/tests/third_party/scipy/line_search_test.py
@@ -86,6 +86,7 @@ class TestLineSearch(jtu.JaxTestCase):
   @jtu.sample_product(
     name=['_line_func_1', '_line_func_2'],
   )
+  @jax.default_matmul_precision("float32")
   def test_line_search_wolfe2(self, name):
     def bind_index(func, idx):
       # Remember Python's closure semantics!