diff --git a/.gitmodules b/.gitmodules
new file mode 100644
index 0000000000..5b0f9942e4
--- /dev/null
+++ b/.gitmodules
@@ -0,0 +1,4 @@
+[submodule "tests/Images/External"]
+	path = tests/Images/External
+	url = https://github.com/antonfirsov/Imagesharp.Tests.Images.git
+	branch = master
diff --git a/tests/Images/External b/tests/Images/External
new file mode 160000
index 0000000000..8240bdb291
--- /dev/null
+++ b/tests/Images/External
@@ -0,0 +1 @@
+Subproject commit 8240bdb291e3476c4e50fef6fe2fccfe4fbd10c4