diff --git a/test/units/modules/network/dellos10/dellos10_module.py b/test/units/modules/network/dellos10/dellos10_module.py
index 4521bb2e38..30f048c08b 100644
--- a/test/units/modules/network/dellos10/dellos10_module.py
+++ b/test/units/modules/network/dellos10/dellos10_module.py
@@ -32,6 +32,9 @@ fixture_data = {}
 
 
 def load_fixture(name):
+    # convert illegal filenames (both unix and windows to another char)
+    name = name.replace(':', '_semicolon_')
+
     path = os.path.join(fixture_path, name)
 
     if path in fixture_data:
diff --git a/test/units/modules/network/dellos10/fixtures/show_processes_node-id_1__grep_Mem: b/test/units/modules/network/dellos10/fixtures/show_processes_node-id_1__grep_Mem_semicolon_
similarity index 100%
rename from test/units/modules/network/dellos10/fixtures/show_processes_node-id_1__grep_Mem:
rename to test/units/modules/network/dellos10/fixtures/show_processes_node-id_1__grep_Mem_semicolon_