diff --git a/images/test/basic-env.png b/images/test/basic-env.png
deleted file mode 100644
index a2cda73e7425888066bf88409a94823c41806e1c..0000000000000000000000000000000000000000
Binary files a/images/test/basic-env.png and /dev/null differ
diff --git a/images/test/dummy-file b/images/test/dummy-file
new file mode 100644
index 0000000000000000000000000000000000000000..f0fff49e5cd610a3530bdeaa6f1703c230f2cd68
--- /dev/null
+++ b/images/test/dummy-file
@@ -0,0 +1 @@
+dummy file to allow folder to be committed.
diff --git a/images/test/env-path.png b/images/test/env-path.png
deleted file mode 100644
index 9027b6da0b79b496afac10869c7713d3ee552d86..0000000000000000000000000000000000000000
Binary files a/images/test/env-path.png and /dev/null differ
diff --git a/images/test/env-tree-graph.png b/images/test/env-tree-graph.png
deleted file mode 100644
index 9b2a2d6a9cc4792c962e0fdbdd87f233aaac7d7d..0000000000000000000000000000000000000000
Binary files a/images/test/env-tree-graph.png and /dev/null differ
diff --git a/images/test/env-tree-spatial.png b/images/test/env-tree-spatial.png
deleted file mode 100644
index 16eff313d318fa1aaa4f0a8a3f7866aba98a3568..0000000000000000000000000000000000000000
Binary files a/images/test/env-tree-spatial.png and /dev/null differ