diff --git a/requirements-testing.txt b/requirements-testing.txt
index a6041972cd..a1e054f7e6 100644
--- a/requirements-testing.txt
+++ b/requirements-testing.txt
@@ -11,7 +11,6 @@ executing
 asttokens
 responses
 pysocks
-socksio
 httpcore[http2]
 setuptools
 Brotli
diff --git a/scripts/populate_tox/tox.jinja b/scripts/populate_tox/tox.jinja
index 40426d30fb..6bf0b4b446 100644
--- a/scripts/populate_tox/tox.jinja
+++ b/scripts/populate_tox/tox.jinja
@@ -81,6 +81,7 @@ deps =
     py3.8-common: hypothesis
     common: pytest-asyncio
     common: httpcore[asyncio]
+    common: socksio
     # See https://github.com/pytest-dev/pytest/issues/9621
     # and https://github.com/pytest-dev/pytest-forked/issues/67
     # for justification of the upper bound on pytest
@@ -99,6 +100,7 @@ deps =
     {py3.8,py3.9,py3.10,py3.11,py3.12}-gevent: pytest
     gevent: pytest-asyncio
     gevent: setuptools<82
+    gevent: socksio
     {py3.10,py3.11}-gevent: zope.event<5.0.0
     {py3.10,py3.11}-gevent: zope.interface<8.0
 
diff --git a/tox.ini b/tox.ini
index e91115d32e..30fdfcf123 100644
--- a/tox.ini
+++ b/tox.ini
@@ -404,6 +404,7 @@ deps =
     py3.8-common: hypothesis
     common: pytest-asyncio
     common: httpcore[asyncio]
+    common: socksio
     # See https://github.com/pytest-dev/pytest/issues/9621
     # and https://github.com/pytest-dev/pytest-forked/issues/67
     # for justification of the upper bound on pytest
@@ -422,6 +423,7 @@ deps =
     {py3.8,py3.9,py3.10,py3.11,py3.12}-gevent: pytest
     gevent: pytest-asyncio
     gevent: setuptools<82
+    gevent: socksio
     {py3.10,py3.11}-gevent: zope.event<5.0.0
     {py3.10,py3.11}-gevent: zope.interface<8.0