diff --git a/.gitmodules b/.gitmodules
index 7d85724fadf9688055e5b7b9009885fad793dbd1..7b666184bc5735128270385c28131cf79ba8fe91 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -13,9 +13,6 @@
 [submodule "ThirdParty/autocheck"]
 	path = ThirdParty/autocheck
 	url = https://github.com/thejohnfreeman/autocheck.git
-[submodule "Tests/Data"]
-	path = Tests/Data
-	url = https://github.com/ufz/ogs-data
 [submodule "ThirdParty/vtkGUISupportQt"]
 	path = ThirdParty/vtkGUISupportQt
 	url = https://github.com/ufz/vtkGUISupportQt.git
diff --git a/Tests/Data b/Tests/Data
deleted file mode 160000
index 8a91a43ac885fbcb3876a808708ec588b9fea42c..0000000000000000000000000000000000000000
--- a/Tests/Data
+++ /dev/null
@@ -1 +0,0 @@
-Subproject commit 8a91a43ac885fbcb3876a808708ec588b9fea42c