diff --git a/.gitmodules b/.gitmodules
index 2cd296e6..8571383a 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -16,3 +16,6 @@
 [submodule "lib/murky"]
 	path = lib/murky
 	url = https://github.com/dmfxyz/murky.git
+[submodule "lib/erc4626-tests"]
+	path = lib/erc4626-tests
+	url = https://github.com/a16z/erc4626-tests
diff --git a/lib/erc4626-tests b/lib/erc4626-tests
new file mode 160000
index 00000000..8b1d7c2a
--- /dev/null
+++ b/lib/erc4626-tests
@@ -0,0 +1 @@
+Subproject commit 8b1d7c2ac248c33c3506b1bff8321758943c5e11