diff --git a/requirements/test-constraints.txt b/requirements/test-constraints.txt
new file mode 100644
index 0000000..3e57519
--- /dev/null
+++ b/requirements/test-constraints.txt
@@ -0,0 +1 @@
+urllib3<2  # https://github.com/kevin1024/vcrpy/issues/688
diff --git a/requirements/test-requirements.txt b/requirements/test-requirements.txt
index 8240ae4..8fe05ef 100644
--- a/requirements/test-requirements.txt
+++ b/requirements/test-requirements.txt
@@ -1,3 +1,5 @@
+-c test-constraints.txt
+
 pytest>=6
   pytest-asyncio>=0.17
   pytest-vcr