diff --git a/tests/DockerTest.py b/tests/DockerTest.py
index 092b2a1c1..25dd8efb1 100644
--- a/tests/DockerTest.py
+++ b/tests/DockerTest.py
@@ -51,6 +51,8 @@ class DockerTest(Test) :
             if isdir(example_data) :
                 for cp_dir in listdir(example_data) :
                     if isdir(join(example_data, cp_dir)) :
+                        if isdir(join("/tmp/bw-data", cp_dir)) :
+                            run("sudo rm -rf " + join("/tmp/bw-data", cp_dir), shell=True)
                         copytree(join(example_data, cp_dir), join("/tmp/bw-data", cp_dir))
             proc = run("docker-compose pull", shell=True, cwd=test)
             if proc.returncode != 0 :