diff --git a/source/graphics/ColladaManager.cpp b/source/graphics/ColladaManager.cpp
index 31d3daa562..25a7912e09 100644
--- a/source/graphics/ColladaManager.cpp
+++ b/source/graphics/ColladaManager.cpp
@@ -1,4 +1,4 @@
-/* Copyright (C) 2017 Wildfire Games.
+/* Copyright (C) 2021 Wildfire Games.
  * This file is part of 0 A.D.
  *
  * 0 A.D. is free software: you can redistribute it and/or modify
@@ -22,7 +22,6 @@
 #include <boost/algorithm/string.hpp>
 
 #include "graphics/ModelDef.h"
-#include "lib/fnv_hash.h"
 #include "maths/MD5.h"
 #include "ps/CacheLoader.h"
 #include "ps/CLogger.h"
diff --git a/source/lib/tests/test_fnv_hash.h b/source/lib/tests/test_fnv_hash.h
index ef768f3d51..bf8b09939e 100644
--- a/source/lib/tests/test_fnv_hash.h
+++ b/source/lib/tests/test_fnv_hash.h
@@ -1,4 +1,4 @@
-/* Copyright (C) 2010 Wildfire Games.
+/* Copyright (C) 2021 Wildfire Games.
  *
  * Permission is hereby granted, free of charge, to any person obtaining
  * a copy of this software and associated documentation files (the
@@ -40,4 +40,11 @@ public:
 		TS_ASSERT_EQUALS(h2, 0xD80BDA3FBE244A0Aull);		// verify value for simple string
 		TS_ASSERT_EQUALS(fnv_hash64("abcdef", 6), h2);	// same result if hashing buffer
 	}
+
+	void test_collisions()
+	{
+		TS_ASSERT_EQUALS(fnv_hash("collisions", 10), fnv_hash("silage_formism", 14));
+		TS_ASSERT_EQUALS(fnv_hash("2018-04-13 06:10", 16), fnv_hash("1984-05-01 06:20", 16));
+		TS_ASSERT_EQUALS(fnv_hash("etude", 5), fnv_hash("nonassister", 11));
+	}
 };