diff --git a/CMakeLists.txt b/CMakeLists.txt
index dbde281e4..a0862a082 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -243,18 +243,18 @@ IF (BUILD_CLAR)
 
 	INCLUDE_DIRECTORIES(${CLAR_PATH})
 	FILE(GLOB_RECURSE SRC_TEST ${CLAR_PATH}/*/*.c)
-	SET(SRC_CLAR "${CLAR_PATH}/main.c" "${CLAR_PATH}/clar_libgit2.c" "${CLAR_PATH}/clar/clar.c")
+	SET(SRC_CLAR "${CLAR_PATH}/main.c" "${CLAR_PATH}/clar_libgit2.c" "${CLAR_PATH}/clar.c")
 	SET(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Wno-missing-prototypes")
 
 	ADD_CUSTOM_COMMAND(
 		OUTPUT ${CLAR_PATH}/clar.suite
-		COMMAND ${PYTHON_EXECUTABLE} clar/generate.py . -xonline
+		COMMAND ${PYTHON_EXECUTABLE} generate.py -xonline .
 		DEPENDS ${SRC_TEST}
 		WORKING_DIRECTORY ${CLAR_PATH}
 	)
 
 	SET_SOURCE_FILES_PROPERTIES(
-		${CLAR_PATH}/clar/clar.c
+		${CLAR_PATH}/clar.c
 		PROPERTIES OBJECT_DEPENDS ${CLAR_PATH}/clar.suite)
 
 	ADD_EXECUTABLE(libgit2_clar ${SRC_GIT2} ${SRC_OS} ${SRC_CLAR} ${SRC_TEST} ${SRC_ZLIB} ${SRC_HTTP} ${SRC_REGEX} ${SRC_SHA1})
diff --git a/tests-clar/clar.c b/tests-clar/clar.c
new file mode 100644
index 000000000..a7d8d30d0
--- /dev/null
+++ b/tests-clar/clar.c
@@ -0,0 +1,408 @@
+#include <assert.h>
+#include <setjmp.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <math.h>
+#include <stdarg.h>
+
+/* required for sandboxing */
+#include <sys/types.h>
+#include <sys/stat.h>
+
+#ifdef _WIN32
+#	include <windows.h>
+#	include <io.h>
+#	include <shellapi.h>
+#	include <direct.h>
+
+#	define _MAIN_CC __cdecl
+
+#	define stat(path, st) _stat(path, st)
+#	define mkdir(path, mode) _mkdir(path)
+#	define chdir(path) _chdir(path)
+#	define access(path, mode) _access(path, mode)
+#	define strdup(str) _strdup(str)
+#	define strcasecmp(a,b) _stricmp(a,b)
+
+#	ifndef __MINGW32__
+#		pragma comment(lib, "shell32")
+#		define strncpy(to, from, to_size) strncpy_s(to, to_size, from, _TRUNCATE)
+#		define W_OK 02
+#		define S_ISDIR(x) ((x & _S_IFDIR) != 0)
+#		define snprint_eq(buf,sz,fmt,a,b) _snprintf_s(buf,sz,_TRUNCATE,fmt,a,b)
+#	else
+#		define snprint_eq snprintf
+#	endif
+	typedef struct _stat STAT_T;
+#else
+#	include <sys/wait.h> /* waitpid(2) */
+#	include <unistd.h>
+#	define _MAIN_CC
+#	define snprint_eq snprintf
+	typedef struct stat STAT_T;
+#endif
+
+#include "clar.h"
+
+static void fs_rm(const char *_source);
+static void fs_copy(const char *_source, const char *dest);
+
+static const char *
+fixture_path(const char *base, const char *fixture_name);
+
+struct clar_error {
+	const char *test;
+	int test_number;
+	const char *suite;
+	const char *file;
+	int line_number;
+	const char *error_msg;
+	char *description;
+
+	struct clar_error *next;
+};
+
+static struct {
+	const char *active_test;
+	const char *active_suite;
+
+	int suite_errors;
+	int total_errors;
+
+	int tests_ran;
+	int suites_ran;
+
+	int report_errors_only;
+	int exit_on_error;
+
+	struct clar_error *errors;
+	struct clar_error *last_error;
+
+	void (*local_cleanup)(void *);
+	void *local_cleanup_payload;
+
+	jmp_buf trampoline;
+	int trampoline_enabled;
+} _clar;
+
+struct clar_func {
+	const char *name;
+	void (*ptr)(void);
+};
+
+struct clar_suite {
+	const char *name;
+	struct clar_func initialize;
+	struct clar_func cleanup;
+	const struct clar_func *tests;
+	size_t test_count;
+	int enabled;
+};
+
+/* From clar_print_*.c */
+static void clar_print_init(int test_count, int suite_count, const char *suite_names);
+static void clar_print_shutdown(int test_count, int suite_count, int error_count);
+static void clar_print_error(int num, const struct clar_error *error);
+static void clar_print_ontest(const char *test_name, int test_number, int failed);
+static void clar_print_onsuite(const char *suite_name, int suite_index);
+static void clar_print_onabort(const char *msg, ...);
+
+/* From clar_sandbox.c */
+static void clar_unsandbox(void);
+static int clar_sandbox(void);
+
+/* Load the declarations for the test suite */
+#include "clar.suite"
+
+/* Core test functions */
+static void
+clar_report_errors(void)
+{
+	int i = 1;
+	struct clar_error *error, *next;
+
+	error = _clar.errors;
+	while (error != NULL) {
+		next = error->next;
+		clar_print_error(i++, error);
+		free(error->description);
+		free(error);
+		error = next;
+	}
+
+	_clar.errors = _clar.last_error = NULL;
+}
+
+static void
+clar_run_test(
+	const struct clar_func *test,
+	const struct clar_func *initialize,
+	const struct clar_func *cleanup)
+{
+	int error_st = _clar.suite_errors;
+
+	_clar.trampoline_enabled = 1;
+
+	if (setjmp(_clar.trampoline) == 0) {
+		if (initialize->ptr != NULL)
+			initialize->ptr();
+
+		test->ptr();
+	}
+
+	_clar.trampoline_enabled = 0;
+
+	if (_clar.local_cleanup != NULL)
+		_clar.local_cleanup(_clar.local_cleanup_payload);
+
+	if (cleanup->ptr != NULL)
+		cleanup->ptr();
+
+	_clar.tests_ran++;
+
+	/* remove any local-set cleanup methods */
+	_clar.local_cleanup = NULL;
+	_clar.local_cleanup_payload = NULL;
+
+	if (_clar.report_errors_only)
+		clar_report_errors();
+	else
+		clar_print_ontest(
+			test->name,
+			_clar.tests_ran,
+			(_clar.suite_errors > error_st)
+		);
+}
+
+static void
+clar_run_suite(const struct clar_suite *suite)
+{
+	const struct clar_func *test = suite->tests;
+	size_t i;
+
+	if (!suite->enabled)
+		return;
+
+	if (_clar.exit_on_error && _clar.total_errors)
+		return;
+
+	if (!_clar.report_errors_only)
+		clar_print_onsuite(suite->name, ++_clar.suites_ran);
+
+	_clar.active_suite = suite->name;
+	_clar.suite_errors = 0;
+
+	for (i = 0; i < suite->test_count; ++i) {
+		_clar.active_test = test[i].name;
+		clar_run_test(&test[i], &suite->initialize, &suite->cleanup);
+
+		if (_clar.exit_on_error && _clar.total_errors)
+			return;
+	}
+}
+
+static void
+clar_usage(const char *arg)
+{
+	printf("Usage: %s [options]\n\n", arg);
+	printf("Options:\n");
+	printf("  -sname\t\tRun only the suite with `name`\n");
+	printf("  -iname\t\tInclude the suite with `name`\n");
+	printf("  -xname\t\tExclude the suite with `name`\n");
+	printf("  -q  \t\tOnly report tests that had an error\n");
+	printf("  -Q  \t\tQuit as soon as a test fails\n");
+	printf("  -l  \t\tPrint suite names\n");
+	exit(-1);
+}
+
+static void
+clar_parse_args(int argc, char **argv)
+{
+	int i;
+
+	for (i = 1; i < argc; ++i) {
+		char *argument = argv[i];
+
+		if (argument[0] != '-')
+			clar_usage(argv[0]);
+
+		switch (argument[1]) {
+		case 's':
+		case 'i':
+		case 'x': { /* given suite name */
+			int offset = (argument[2] == '=') ? 3 : 2;
+			char action = argument[1];
+			size_t j, len;
+
+			argument += offset;
+			len = strlen(argument);
+
+			if (len == 0)
+				clar_usage(argv[0]);
+
+			for (j = 0; j < _clar_suite_count; ++j) {
+				if (strncmp(argument, _clar_suites[j].name, len) == 0) {
+					switch (action) {
+						case 's': clar_run_suite(&_clar_suites[j]); break;
+						case 'i': _clar_suites[j].enabled = 1; break;
+						case 'x': _clar_suites[j].enabled = 0; break;
+					}
+					break;
+				}
+			}
+
+			if (j == _clar_suite_count) {
+				clar_print_onabort("No suite matching '%s' found.\n", argument);
+				exit(-1);
+			}
+			break;
+		}
+
+		case 'q':
+			_clar.report_errors_only = 1;
+			break;
+
+		case 'Q':
+			_clar.exit_on_error = 1;
+			break;
+
+		case 'l': {
+			size_t j;
+			printf("Test suites (use -s<name> to run just one):\n");
+			for (j = 0; j < _clar_suite_count; ++j)
+				printf(" %3d: %s\n", (int)j, _clar_suites[j].name);
+
+			exit(0);
+		}
+
+		default:
+			clar_usage(argv[0]);
+		}
+	}
+}
+
+int
+clar_test(int argc, char **argv)
+{
+	clar_print_init(
+		(int)_clar_callback_count,
+		(int)_clar_suite_count,
+		""
+	);
+
+	if (clar_sandbox() < 0) {
+		clar_print_onabort("Failed to sandbox the test runner.\n");
+		exit(-1);
+	}
+
+	if (argc > 1)
+		clar_parse_args(argc, argv);
+
+	if (!_clar.suites_ran) {
+		size_t i;
+		for (i = 0; i < _clar_suite_count; ++i)
+			clar_run_suite(&_clar_suites[i]);
+	}
+
+	clar_print_shutdown(
+		_clar.tests_ran,
+		(int)_clar_suite_count,
+		_clar.total_errors
+	);
+
+	clar_unsandbox();
+	return _clar.total_errors;
+}
+
+void
+clar__assert(
+	int condition,
+	const char *file,
+	int line,
+	const char *error_msg,
+	const char *description,
+	int should_abort)
+{
+	struct clar_error *error;
+
+	if (condition)
+		return;
+
+	error = calloc(1, sizeof(struct clar_error));
+
+	if (_clar.errors == NULL)
+		_clar.errors = error;
+
+	if (_clar.last_error != NULL)
+		_clar.last_error->next = error;
+
+	_clar.last_error = error;
+
+	error->test = _clar.active_test;
+	error->test_number = _clar.tests_ran;
+	error->suite = _clar.active_suite;
+	error->file = file;
+	error->line_number = line;
+	error->error_msg = error_msg;
+
+	if (description != NULL)
+		error->description = strdup(description);
+
+	_clar.suite_errors++;
+	_clar.total_errors++;
+
+	if (should_abort) {
+		if (!_clar.trampoline_enabled) {
+			clar_print_onabort(
+				"Fatal error: a cleanup method raised an exception.");
+			clar_report_errors();
+			exit(-1);
+		}
+
+		longjmp(_clar.trampoline, -1);
+	}
+}
+
+void clar__assert_equal_s(
+	const char *s1,
+	const char *s2,
+	const char *file,
+	int line,
+	const char *err,
+	int should_abort)
+{
+	int match = (s1 == NULL || s2 == NULL) ? (s1 == s2) : (strcmp(s1, s2) == 0);
+
+	if (!match) {
+		char buf[4096];
+		snprint_eq(buf, 4096, "'%s' != '%s'", s1, s2);
+		clar__assert(0, file, line, err, buf, should_abort);
+	}
+}
+
+void clar__assert_equal_i(
+	int i1,
+	int i2,
+	const char *file,
+	int line,
+	const char *err,
+	int should_abort)
+{
+	if (i1 != i2) {
+		char buf[128];
+		snprint_eq(buf, 128, "%d != %d", i1, i2);
+		clar__assert(0, file, line, err, buf, should_abort);
+	}
+}
+
+void cl_set_cleanup(void (*cleanup)(void *), void *opaque)
+{
+	_clar.local_cleanup = cleanup;
+	_clar.local_cleanup_payload = opaque;
+}
+
+#include "clar/sandbox.h"
+#include "clar/fixtures.h"
+#include "clar/fs.h"
+#include "clar/print.h"
diff --git a/tests-clar/clar.h b/tests-clar/clar.h
new file mode 100644
index 000000000..825874116
--- /dev/null
+++ b/tests-clar/clar.h
@@ -0,0 +1,70 @@
+#ifndef __CLAR_TEST_H__
+#define __CLAR_TEST_H__
+
+#include <stdlib.h>
+
+int clar_test(int argc, char *argv[]);
+
+void cl_set_cleanup(void (*cleanup)(void *), void *opaque);
+void cl_fs_cleanup(void);
+
+#ifdef CLAR_FIXTURE_PATH
+const char *cl_fixture(const char *fixture_name);
+void cl_fixture_sandbox(const char *fixture_name);
+void cl_fixture_cleanup(const char *fixture_name);
+#endif
+
+/**
+ * Assertion macros with explicit error message
+ */
+#define cl_must_pass_(expr, desc) clar__assert((expr) >= 0, __FILE__, __LINE__, "Function call failed: " #expr, desc, 1)
+#define cl_must_fail_(expr, desc) clar__assert((expr) < 0, __FILE__, __LINE__, "Expected function call to fail: " #expr, desc, 1)
+#define cl_assert_(expr, desc) clar__assert((expr) != 0, __FILE__, __LINE__, "Expression is not true: " #expr, desc, 1)
+
+/**
+ * Check macros with explicit error message
+ */
+#define cl_check_pass_(expr, desc) clar__assert((expr) >= 0, __FILE__, __LINE__, "Function call failed: " #expr, desc, 0)
+#define cl_check_fail_(expr, desc) clar__assert((expr) < 0, __FILE__, __LINE__, "Expected function call to fail: " #expr, desc, 0)
+#define cl_check_(expr, desc) clar__assert((expr) != 0, __FILE__, __LINE__, "Expression is not true: " #expr, desc, 0)
+
+/**
+ * Assertion macros with no error message
+ */
+#define cl_must_pass(expr) cl_must_pass_(expr, NULL)
+#define cl_must_fail(expr) cl_must_fail_(expr, NULL)
+#define cl_assert(expr) cl_assert_(expr, NULL)
+
+/**
+ * Check macros with no error message
+ */
+#define cl_check_pass(expr) cl_check_pass_(expr, NULL)
+#define cl_check_fail(expr) cl_check_fail_(expr, NULL)
+#define cl_check(expr) cl_check_(expr, NULL)
+
+/**
+ * Forced failure/warning
+ */
+#define cl_fail(desc) clar__assert(0, __FILE__, __LINE__, "Test failed.", desc, 1)
+#define cl_warning(desc) clar__assert(0, __FILE__, __LINE__, "Warning during test execution:", desc, 0)
+
+/**
+ * Typed assertion macros
+ */
+#define cl_assert_equal_s(s1,s2) clar__assert_equal_s((s1),(s2),__FILE__,__LINE__,"String mismatch: " #s1 " != " #s2, 1)
+#define cl_assert_equal_i(i1,i2) clar__assert_equal_i((i1),(i2),__FILE__,__LINE__,#i1 " != " #i2, 1)
+#define cl_assert_equal_b(b1,b2) clar__assert_equal_i(!!(b1),!!(b2),__FILE__,__LINE__,#b1 " != " #b2, 1)
+#define cl_assert_equal_p(p1,p2) cl_assert((p1) == (p2))
+
+void clar__assert(
+	int condition,
+	const char *file,
+	int line,
+	const char *error,
+	const char *description,
+	int should_abort);
+
+void clar__assert_equal_s(const char *,const char *,const char *,int,const char *,int);
+void clar__assert_equal_i(int,int,const char *,int,const char *,int);
+
+#endif
diff --git a/tests-clar/clar/fixtures.h b/tests-clar/clar/fixtures.h
new file mode 100644
index 000000000..264cd7f4f
--- /dev/null
+++ b/tests-clar/clar/fixtures.h
@@ -0,0 +1,38 @@
+static const char *
+fixture_path(const char *base, const char *fixture_name)
+{
+	static char _path[4096];
+	size_t root_len;
+
+	root_len = strlen(base);
+	strncpy(_path, base, sizeof(_path));
+
+	if (_path[root_len - 1] != '/')
+		_path[root_len++] = '/';
+
+	if (fixture_name[0] == '/')
+		fixture_name++;
+
+	strncpy(_path + root_len,
+		fixture_name,
+		sizeof(_path) - root_len);
+
+	return _path;
+}
+
+#ifdef CLAR_FIXTURE_PATH
+const char *cl_fixture(const char *fixture_name)
+{
+	return fixture_path(CLAR_FIXTURE_PATH, fixture_name);
+}
+
+void cl_fixture_sandbox(const char *fixture_name)
+{
+	fs_copy(cl_fixture(fixture_name), _clar_path);
+}
+
+void cl_fixture_cleanup(const char *fixture_name)
+{
+	fs_rm(fixture_path(_clar_path, fixture_name));
+}
+#endif
diff --git a/tests-clar/clar/fs.h b/tests-clar/clar/fs.h
new file mode 100644
index 000000000..1cdc1ce2f
--- /dev/null
+++ b/tests-clar/clar/fs.h
@@ -0,0 +1,325 @@
+#ifdef _WIN32
+
+#define RM_RETRY_COUNT	5
+#define RM_RETRY_DELAY	10
+
+#ifdef __MINGW32__
+
+/* These security-enhanced functions are not available
+ * in MinGW, so just use the vanilla ones */
+#define wcscpy_s(a, b, c) wcscpy((a), (c))
+#define wcscat_s(a, b, c) wcscat((a), (c))
+
+#endif /* __MINGW32__ */
+
+static int 
+fs__dotordotdot(WCHAR *_tocheck)
+{
+	return _tocheck[0] == '.' &&
+		(_tocheck[1] == '\0' ||
+		 (_tocheck[1] == '.' && _tocheck[2] == '\0'));
+}
+
+static int
+fs_rmdir_rmdir(WCHAR *_wpath)
+{
+	unsigned retries = 1;
+
+	while (!RemoveDirectoryW(_wpath)) {
+		/* Only retry when we have retries remaining, and the
+		 * error was ERROR_DIR_NOT_EMPTY. */
+		if (retries++ > RM_RETRY_COUNT ||
+			ERROR_DIR_NOT_EMPTY != GetLastError())
+			return -1;
+
+		/* Give whatever has a handle to a child item some time
+		 * to release it before trying again */
+		Sleep(RM_RETRY_DELAY * retries * retries);
+	}
+
+	return 0;
+}
+
+static void
+fs_rmdir_helper(WCHAR *_wsource)
+{
+	WCHAR buffer[MAX_PATH];
+	HANDLE find_handle;
+	WIN32_FIND_DATAW find_data;
+	int buffer_prefix_len;
+
+	/* Set up the buffer and capture the length */
+	wcscpy_s(buffer, MAX_PATH, _wsource);
+	wcscat_s(buffer, MAX_PATH, L"\\");
+	buffer_prefix_len = wcslen(buffer);
+
+	/* FindFirstFile needs a wildcard to match multiple items */
+	wcscat_s(buffer, MAX_PATH, L"*");
+	find_handle = FindFirstFileW(buffer, &find_data);
+	cl_assert(INVALID_HANDLE_VALUE != find_handle);
+
+	do {
+		/* FindFirstFile/FindNextFile gives back . and ..
+		 * entries at the beginning */
+		if (fs__dotordotdot(find_data.cFileName))
+			continue;
+
+		wcscpy_s(buffer + buffer_prefix_len, MAX_PATH - buffer_prefix_len, find_data.cFileName);
+
+		if (FILE_ATTRIBUTE_DIRECTORY & find_data.dwFileAttributes)
+			fs_rmdir_helper(buffer);
+		else {
+			/* If set, the +R bit must be cleared before deleting */
+			if (FILE_ATTRIBUTE_READONLY & find_data.dwFileAttributes)
+				cl_assert(SetFileAttributesW(buffer, find_data.dwFileAttributes & ~FILE_ATTRIBUTE_READONLY));
+
+			cl_assert(DeleteFileW(buffer));
+		}
+	}
+	while (FindNextFileW(find_handle, &find_data));
+
+	/* Ensure that we successfully completed the enumeration */
+	cl_assert(ERROR_NO_MORE_FILES == GetLastError());
+
+	/* Close the find handle */
+	FindClose(find_handle);
+
+	/* Now that the directory is empty, remove it */
+	cl_assert(0 == fs_rmdir_rmdir(_wsource));
+}
+
+static int
+fs_rm_wait(WCHAR *_wpath)
+{
+	unsigned retries = 1;
+	DWORD last_error;
+
+	do {
+		if (INVALID_FILE_ATTRIBUTES == GetFileAttributesW(_wpath))
+			last_error = GetLastError();
+		else
+			last_error = ERROR_SUCCESS;
+
+		/* Is the item gone? */
+		if (ERROR_FILE_NOT_FOUND == last_error ||
+			ERROR_PATH_NOT_FOUND == last_error)
+			return 0;
+
+		Sleep(RM_RETRY_DELAY * retries * retries);	
+	}
+	while (retries++ <= RM_RETRY_COUNT);
+
+	return -1;
+}
+
+static void
+fs_rm(const char *_source)
+{
+	WCHAR wsource[MAX_PATH];
+	DWORD attrs;
+
+	/* The input path is UTF-8. Convert it to wide characters
+	 * for use with the Windows API */
+	cl_assert(MultiByteToWideChar(CP_UTF8,
+				MB_ERR_INVALID_CHARS,
+				_source,
+				-1, /* Indicates NULL termination */
+				wsource,
+				MAX_PATH));
+
+	/* Does the item exist? If not, we have no work to do */
+	attrs = GetFileAttributesW(wsource);
+
+	if (INVALID_FILE_ATTRIBUTES == attrs)
+		return;
+
+	if (FILE_ATTRIBUTE_DIRECTORY & attrs)
+		fs_rmdir_helper(wsource);
+	else {
+		/* The item is a file. Strip the +R bit */
+		if (FILE_ATTRIBUTE_READONLY & attrs)
+			cl_assert(SetFileAttributesW(wsource, attrs & ~FILE_ATTRIBUTE_READONLY));
+
+		cl_assert(DeleteFileW(wsource));
+	}
+
+	/* Wait for the DeleteFile or RemoveDirectory call to complete */
+	cl_assert(0 == fs_rm_wait(wsource));
+}
+
+static void
+fs_copydir_helper(WCHAR *_wsource, WCHAR *_wdest)
+{
+	WCHAR buf_source[MAX_PATH], buf_dest[MAX_PATH];
+	HANDLE find_handle;
+	WIN32_FIND_DATAW find_data;
+	int buf_source_prefix_len, buf_dest_prefix_len;
+
+	wcscpy_s(buf_source, MAX_PATH, _wsource);
+	wcscat_s(buf_source, MAX_PATH, L"\\");
+	buf_source_prefix_len = wcslen(buf_source);
+
+	wcscpy_s(buf_dest, MAX_PATH, _wdest);
+	wcscat_s(buf_dest, MAX_PATH, L"\\");
+	buf_dest_prefix_len = wcslen(buf_dest);
+
+	/* Get an enumerator for the items in the source. */
+	wcscat_s(buf_source, MAX_PATH, L"*");
+	find_handle = FindFirstFileW(buf_source, &find_data);
+	cl_assert(INVALID_HANDLE_VALUE != find_handle);
+
+	/* Create the target directory. */
+	cl_assert(CreateDirectoryW(_wdest, NULL));
+
+	do {
+		/* FindFirstFile/FindNextFile gives back . and ..
+		 * entries at the beginning */
+		if (fs__dotordotdot(find_data.cFileName))
+			continue;
+
+		wcscpy_s(buf_source + buf_source_prefix_len, MAX_PATH - buf_source_prefix_len, find_data.cFileName);
+		wcscpy_s(buf_dest + buf_dest_prefix_len, MAX_PATH - buf_dest_prefix_len, find_data.cFileName);
+
+		if (FILE_ATTRIBUTE_DIRECTORY & find_data.dwFileAttributes)
+			fs_copydir_helper(buf_source, buf_dest);
+		else
+			cl_assert(CopyFileW(buf_source, buf_dest, TRUE));
+	}
+	while (FindNextFileW(find_handle, &find_data));
+
+	/* Ensure that we successfully completed the enumeration */
+	cl_assert(ERROR_NO_MORE_FILES == GetLastError());
+
+	/* Close the find handle */
+	FindClose(find_handle);
+}
+
+static void
+fs_copy(const char *_source, const char *_dest)
+{
+	WCHAR wsource[MAX_PATH], wdest[MAX_PATH];
+	DWORD source_attrs, dest_attrs;
+	HANDLE find_handle;
+	WIN32_FIND_DATAW find_data;
+	
+	/* The input paths are UTF-8. Convert them to wide characters
+	 * for use with the Windows API. */
+	cl_assert(MultiByteToWideChar(CP_UTF8,
+				MB_ERR_INVALID_CHARS,
+				_source,
+				-1,
+				wsource,
+				MAX_PATH));
+
+	cl_assert(MultiByteToWideChar(CP_UTF8,
+				MB_ERR_INVALID_CHARS,
+				_dest,
+				-1,
+				wdest,
+				MAX_PATH));
+
+	/* Check the source for existence */
+	source_attrs = GetFileAttributesW(wsource);
+	cl_assert(INVALID_FILE_ATTRIBUTES != source_attrs);
+
+	/* Check the target for existence */
+	dest_attrs = GetFileAttributesW(wdest);
+
+	if (INVALID_FILE_ATTRIBUTES != dest_attrs) {
+		/* Target exists; append last path part of source to target.
+		 * Use FindFirstFile to parse the path */
+		find_handle = FindFirstFileW(wsource, &find_data);
+		cl_assert(INVALID_HANDLE_VALUE != find_handle);
+		wcscat_s(wdest, MAX_PATH, L"\\");
+		wcscat_s(wdest, MAX_PATH, find_data.cFileName);
+		FindClose(find_handle);
+
+		/* Check the new target for existence */
+		cl_assert(INVALID_FILE_ATTRIBUTES == GetFileAttributesW(wdest));
+	}
+
+	if (FILE_ATTRIBUTE_DIRECTORY & source_attrs)
+		fs_copydir_helper(wsource, wdest);
+	else
+		cl_assert(CopyFileW(wsource, wdest, TRUE));
+}
+
+void
+cl_fs_cleanup(void)
+{
+	fs_rm(fixture_path(_clar_path, "*"));
+}
+
+#else
+static int
+shell_out(char * const argv[])
+{
+	int status;
+	pid_t pid;
+
+	pid = fork();
+
+	if (pid < 0) {
+		fprintf(stderr,
+			"System error: `fork()` call failed.\n");
+		exit(-1);
+	}
+
+	if (pid == 0) {
+		execv(argv[0], argv);
+	}
+
+	waitpid(pid, &status, 0);
+	return WEXITSTATUS(status);
+}
+
+static void
+fs_copy(const char *_source, const char *dest)
+{
+	char *argv[5];
+	char *source;
+	size_t source_len;
+
+	source = strdup(_source);
+	source_len = strlen(source);
+
+	if (source[source_len - 1] == '/')
+		source[source_len - 1] = 0;
+
+	argv[0] = "/bin/cp";
+	argv[1] = "-R";
+	argv[2] = source;
+	argv[3] = (char *)dest;
+	argv[4] = NULL;
+
+	cl_must_pass_(
+		shell_out(argv),
+		"Failed to copy test fixtures to sandbox"
+	);
+
+	free(source);
+}
+
+static void
+fs_rm(const char *source)
+{
+	char *argv[4];
+
+	argv[0] = "/bin/rm";
+	argv[1] = "-Rf";
+	argv[2] = (char *)source;
+	argv[3] = NULL;
+
+	cl_must_pass_(
+		shell_out(argv),
+		"Failed to cleanup the sandbox"
+	);
+}
+
+void
+cl_fs_cleanup(void)
+{
+	clar_unsandbox();
+	clar_sandbox();
+}
+#endif
diff --git a/tests-clar/clar/print.h b/tests-clar/clar/print.h
new file mode 100644
index 000000000..db9da9198
--- /dev/null
+++ b/tests-clar/clar/print.h
@@ -0,0 +1,59 @@
+
+static void clar_print_init(int test_count, int suite_count, const char *suite_names)
+{
+	(void)test_count;
+	printf("Loaded %d suites: %s\n", (int)suite_count, suite_names);
+	printf("Started\n");
+}
+
+static void clar_print_shutdown(int test_count, int suite_count, int error_count)
+{
+	(void)test_count;
+	(void)suite_count;
+	(void)error_count;
+
+	printf("\n\n");
+	clar_report_errors();
+}
+
+static void clar_print_error(int num, const struct clar_error *error)
+{
+	printf("  %d) Failure:\n", num);
+
+	printf("%s::%s [%s:%d]\n",
+		error->suite,
+		error->test,
+		error->file,
+		error->line_number);
+
+	printf("  %s\n", error->error_msg);
+
+	if (error->description != NULL)
+		printf("  %s\n", error->description);
+
+	printf("\n");
+	fflush(stdout);
+}
+
+static void clar_print_ontest(const char *test_name, int test_number, int failed)
+{
+	(void)test_name;
+	(void)test_number;
+	printf("%c", failed ? 'F' : '.');
+	fflush(stdout);
+}
+
+static void clar_print_onsuite(const char *suite_name, int suite_index)
+{
+	/* noop */
+	(void)suite_index;
+	(void)suite_name;
+}
+
+static void clar_print_onabort(const char *msg, ...)
+{
+	va_list argp;
+	va_start(argp, msg);
+	vfprintf(stderr, msg, argp);
+	va_end(argp);
+}
diff --git a/tests-clar/clar/sandbox.h b/tests-clar/clar/sandbox.h
new file mode 100644
index 000000000..bed3011fe
--- /dev/null
+++ b/tests-clar/clar/sandbox.h
@@ -0,0 +1,127 @@
+static char _clar_path[4096];
+
+static int
+is_valid_tmp_path(const char *path)
+{
+	STAT_T st;
+
+	if (stat(path, &st) != 0)
+		return 0;
+
+	if (!S_ISDIR(st.st_mode))
+		return 0;
+
+	return (access(path, W_OK) == 0);
+}
+
+static int
+find_tmp_path(char *buffer, size_t length)
+{
+#ifndef _WIN32
+	static const size_t var_count = 4;
+	static const char *env_vars[] = {
+		"TMPDIR", "TMP", "TEMP", "USERPROFILE"
+ 	};
+
+ 	size_t i;
+
+	for (i = 0; i < var_count; ++i) {
+		const char *env = getenv(env_vars[i]);
+		if (!env)
+			continue;
+
+		if (is_valid_tmp_path(env)) {
+			strncpy(buffer, env, length);
+			return 0;
+		}
+	}
+
+	/* If the environment doesn't say anything, try to use /tmp */
+	if (is_valid_tmp_path("/tmp")) {
+		strncpy(buffer, "/tmp", length);
+		return 0;
+	}
+
+#else
+	if (GetTempPath((DWORD)length, buffer))
+		return 0;
+#endif
+
+	/* This system doesn't like us, try to use the current directory */
+	if (is_valid_tmp_path(".")) {
+		strncpy(buffer, ".", length);
+		return 0;
+	}
+
+	return -1;
+}
+
+static void clar_unsandbox(void)
+{
+	if (_clar_path[0] == '\0')
+		return;
+
+#ifdef _WIN32
+	chdir("..");
+#endif
+
+	fs_rm(_clar_path);
+}
+
+static int build_sandbox_path(void)
+{
+	const char path_tail[] = "clar_tmp_XXXXXX";
+	size_t len;
+
+	if (find_tmp_path(_clar_path, sizeof(_clar_path)) < 0)
+		return -1;
+
+	len = strlen(_clar_path);
+
+#ifdef _WIN32
+	{ /* normalize path to POSIX forward slashes */
+		size_t i;
+		for (i = 0; i < len; ++i) {
+			if (_clar_path[i] == '\\')
+				_clar_path[i] = '/';
+		}
+	}
+#endif
+
+	if (_clar_path[len - 1] != '/') {
+		_clar_path[len++] = '/';
+	}
+
+	strncpy(_clar_path + len, path_tail, sizeof(_clar_path) - len);
+
+#if defined(__MINGW32__)
+	if (_mktemp(_clar_path) == NULL)
+		return -1;
+
+	if (mkdir(_clar_path, 0700) != 0)
+		return -1;
+#elif defined(_WIN32)
+	if (_mktemp_s(_clar_path, sizeof(_clar_path)) != 0)
+		return -1;
+
+	if (mkdir(_clar_path, 0700) != 0)
+		return -1;
+#else
+	if (mkdtemp(_clar_path) == NULL)
+		return -1;
+#endif
+
+	return 0;
+}
+
+static int clar_sandbox(void)
+{
+	if (_clar_path[0] == '\0' && build_sandbox_path() < 0)
+		return -1;
+
+	if (chdir(_clar_path) != 0)
+		return -1;
+
+	return 0;
+}
+
diff --git a/tests-clar/clar_libgit2.h b/tests-clar/clar_libgit2.h
index 15b5daaf3..91a542654 100644
--- a/tests-clar/clar_libgit2.h
+++ b/tests-clar/clar_libgit2.h
@@ -1,7 +1,7 @@
 #ifndef __CLAR_LIBGIT2__
 #define __CLAR_LIBGIT2__
 
-#include "clar/clar.h"
+#include "clar.h"
 #include <git2.h>
 #include "common.h"
 
diff --git a/tests-clar/generate.py b/tests-clar/generate.py
new file mode 100644
index 000000000..74b69bda3
--- /dev/null
+++ b/tests-clar/generate.py
@@ -0,0 +1,237 @@
+#!/usr/bin/env python
+
+from __future__ import with_statement
+from string import Template
+import re, fnmatch, os, codecs, pickle
+
+class Module(object):
+    class Template(object):
+        def __init__(self, module):
+            self.module = module
+
+        def _render_callback(self, cb):
+            if not cb:
+                return '{ NULL, NULL }'
+            return '{ "%s", &%s }' % (cb['short_name'], cb['symbol'])
+
+    class DeclarationTemplate(Template):
+        def render(self):
+            out = "\n".join("extern %s;" % cb['declaration'] for cb in self.module.callbacks)
+
+            if self.module.initialize:
+                out += "extern %s;\n" % self.module.initialize['declaration']
+
+            if self.module.cleanup:
+                out += "extern %s;\n" % self.module.cleanup['declaration']
+
+            return out
+
+    class CallbacksTemplate(Template):
+        def render(self):
+            out = "static const struct clar_func _clar_cb_%s[] = {\n" % self.module.name
+            out += ",\n".join(self._render_callback(cb) for cb in self.module.callbacks)
+            out += "\n};\n"
+            return out
+
+    class InfoTemplate(Template):
+        def render(self):
+            return Template(
+            r"""{
+                    "${clean_name}",
+                    ${initialize},
+                    ${cleanup},
+                    ${cb_ptr}, ${cb_count}, ${enabled}
+                }"""
+            ).substitute(
+                clean_name = self.module.clean_name(),
+                initialize = self._render_callback(self.module.initialize),
+                cleanup = self._render_callback(self.module.cleanup),
+                cb_ptr = "_clar_cb_%s" % self.module.name,
+                cb_count = len(self.module.callbacks),
+                enabled = int(self.module.enabled)
+            )
+
+    def __init__(self, name):
+        self.name = name
+
+        self.mtime = 0
+        self.enabled = True
+        self.modified = False
+
+    def clean_name(self):
+        return self.name.replace("_", "::")
+
+    def _skip_comments(self, text):
+        SKIP_COMMENTS_REGEX = re.compile(
+            r'//.*?$|/\*.*?\*/|\'(?:\\.|[^\\\'])*\'|"(?:\\.|[^\\"])*"',
+            re.DOTALL | re.MULTILINE)
+
+        def _replacer(match):
+            s = match.group(0)
+            return "" if s.startswith('/') else s
+
+        return re.sub(SKIP_COMMENTS_REGEX, _replacer, text)
+
+    def parse(self, contents):
+        TEST_FUNC_REGEX = r"^(void\s+(test_%s__(\w+))\(\s*void\s*\))\s*\{"
+
+        contents = self._skip_comments(contents)
+        regex = re.compile(TEST_FUNC_REGEX % self.name, re.MULTILINE)
+
+        self.callbacks = []
+        self.initialize = None
+        self.cleanup = None
+
+        for (declaration, symbol, short_name) in regex.findall(contents):
+            data = {
+                "short_name" : short_name,
+                "declaration" : declaration,
+                "symbol" : symbol
+            }
+
+            if short_name == 'initialize':
+                self.initialize = data
+            elif short_name == 'cleanup':
+                self.cleanup = data
+            else:
+                self.callbacks.append(data)
+
+        return self.callbacks != []
+
+    def refresh(self, path):
+        self.modified = False
+
+        try:
+            st = os.stat(path)
+
+            # Not modified
+            if st.st_mtime == self.mtime:
+                return True
+
+            self.modified = True
+            self.mtime = st.st_mtime
+
+            with open(path) as fp:
+                raw_content = fp.read()
+
+        except IOError:
+            return False
+
+        return self.parse(raw_content)
+
+class TestSuite(object):
+
+    def __init__(self, path):
+        self.path = path
+
+    def should_generate(self, path):
+        if not os.path.isfile(path):
+            return True
+
+        if any(module.modified for module in self.modules.values()):
+            return True
+
+        return False
+
+    def find_modules(self):
+        modules = []
+        for root, _, files in os.walk(self.path):
+            module_root = root[len(self.path):]
+            module_root = [c for c in module_root.split(os.sep) if c]
+
+            tests_in_module = fnmatch.filter(files, "*.c")
+
+            for test_file in tests_in_module:
+                full_path = os.path.join(root, test_file)
+                module_name = "_".join(module_root + [test_file[:-2]])
+
+                modules.append((full_path, module_name))
+
+        return modules
+
+    def load_cache(self):
+        path = os.path.join(self.path, '.clarcache')
+        cache = {}
+
+        try:
+            fp = open(path)
+            cache = pickle.load(fp)
+            fp.close()
+        except IOError:
+            pass
+
+        return cache
+
+    def save_cache(self):
+        path = os.path.join(self.path, '.clarcache')
+        with open(path, 'w') as cache:
+            pickle.dump(self.modules, cache)
+
+    def load(self, force = False):
+        module_data = self.find_modules()
+        self.modules = {} if force else self.load_cache()
+
+        for path, name in module_data:
+            if name not in self.modules:
+                self.modules[name] = Module(name)
+
+            if not self.modules[name].refresh(path):
+                del self.modules[name]
+
+    def disable(self, excluded):
+        for exclude in excluded:
+            for module in self.modules.values():
+                name = module.clean_name()
+                if name.startswith(exclude):
+                    module.enabled = False
+                    module.modified = True
+
+    def suite_count(self):
+        return len(self.modules)
+
+    def callback_count(self):
+        return sum(len(module.callbacks) for module in self.modules.values())
+
+    def write(self):
+        output = os.path.join(self.path, 'clar.suite')
+
+        if not self.should_generate(output):
+            return False
+
+        with open(output, 'w') as data:
+            for module in self.modules.values():
+                t = Module.DeclarationTemplate(module)
+                data.write(t.render())
+
+            for module in self.modules.values():
+                t = Module.CallbacksTemplate(module)
+                data.write(t.render())
+
+            suites = "static struct clar_suite _clar_suites[] = {" + ','.join(
+                Module.InfoTemplate(module).render() for module in self.modules.values()
+            ) + "};"
+
+            data.write(suites)
+
+            data.write("static const size_t _clar_suite_count = %d;" % self.suite_count())
+            data.write("static const size_t _clar_callback_count = %d;" % self.callback_count())
+
+        suite.save_cache()
+        return True
+
+if __name__ == '__main__':
+    from optparse import OptionParser
+
+    parser = OptionParser()
+    parser.add_option('-f', '--force', dest='force', default=False)
+    parser.add_option('-x', '--exclude', dest='excluded', action='append', default=[])
+
+    options, args = parser.parse_args()
+
+    for path in args or ['.']:
+        suite = TestSuite(path)
+        suite.load(options.force)
+        suite.disable(options.excluded)
+        if suite.write():
+            print "Written `clar.suite` (%d suites)" % len(suite.modules)
+