diff --git a/tests/Makefile b/tests/Makefile
index 4b3a10019..63c819f9c 100644
--- a/tests/Makefile
+++ b/tests/Makefile
@@ -12,7 +12,6 @@ run_OBJ := \
 	$(subst .cpp,.o,$(wildcard $(d)tests/*.cpp)) \
 	$(d)support/main.o \
 	$(d)support/util.o \
-	$(d)support/util_unix.o \
 	$(TOP)lib/libaegisub.a \
 	$(TOP)lib/libuniversalchardet.a \
 	$(GTEST_FILE).o
diff --git a/tests/support/util.h b/tests/support/util.h
index a08542163..a2713b48f 100644
--- a/tests/support/util.h
+++ b/tests/support/util.h
@@ -15,9 +15,6 @@
 // Aegisub Project http://www.aegisub.org/
 
 #include <string>
-#include <vector>
-
-#include <stdarg.h>
 
 namespace util {
 bool compare(std::string const& file1, std::string const& file2);
diff --git a/tests/support/util_unix.cpp b/tests/support/util_unix.cpp
deleted file mode 100644
index 0bb2cfd61..000000000
--- a/tests/support/util_unix.cpp
+++ /dev/null
@@ -1,31 +0,0 @@
-// Copyright (c) 2010, Amar Takhar <verm@aegisub.org>
-//
-// Permission to use, copy, modify, and distribute this software for any
-// purpose with or without fee is hereby granted, provided that the above
-// copyright notice and this permission notice appear in all copies.
-//
-// THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
-// WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
-// MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
-// ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
-// WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
-// ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
-// OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
-//
-// $Id$
-
-/// @file util_unix.cpp
-/// @brief Common utilities used in tests.
-/// @ingroup util unix
-
-#include <unistd.h>
-#include "util.h"
-
-namespace util {
-
-void remove(const std::string& file) {
-	unlink(file.c_str());
-}
-
-} // namespace util
-
diff --git a/tests/support/util_windows.cpp b/tests/support/util_windows.cpp
deleted file mode 100644
index 7f6acfce5..000000000
--- a/tests/support/util_windows.cpp
+++ /dev/null
@@ -1,32 +0,0 @@
-// Copyright (c) 2010, Amar Takhar <verm@aegisub.org>
-//
-// Permission to use, copy, modify, and distribute this software for any
-// purpose with or without fee is hereby granted, provided that the above
-// copyright notice and this permission notice appear in all copies.
-//
-// THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
-// WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
-// MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
-// ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
-// WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
-// ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
-// OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
-//
-// $Id$
-
-/// @file util_windows.cpp
-/// @brief Common utilities used in tests.
-/// @ingroup util windows
-
-#include <io.h>
-#include "util.h"
-
-namespace util {
-
-void remove(const std::string& file) {
-	_unlink(file.c_str());
-}
-
-} // namespace util
-
-