thodg/libgit2

diff --git a/src/remote.c b/src/remote.c
index f31fc15..d31e1b8 100644
--- a/src/remote.c
+++ b/src/remote.c
@@ -153,7 +153,7 @@ static int get_check_cert(int *out, git_repository *repo)
 	 * most specific to least specific. */
 
 	/* GIT_SSL_NO_VERIFY environment variable */
-	if ((val = getenv("GIT_SSL_NO_VERIFY")) != NULL)
+	if ((val = p_getenv("GIT_SSL_NO_VERIFY")) != NULL)
 		return git_config_parse_bool(out, val);
 
 	/* http.sslVerify config setting */
@@ -759,7 +759,7 @@ int git_remote__get_http_proxy(git_remote *remote, bool use_ssl, char **proxy_ur
 {
 	git_config *cfg;
 	git_config_entry *ce = NULL;
-	const char *val = NULL;
+	git_buf val = GIT_BUF_INIT;
 	int error;
 
 	assert(remote);
@@ -789,7 +789,7 @@ int git_remote__get_http_proxy(git_remote *remote, bool use_ssl, char **proxy_ur
 			return error;
 
 		if (ce && ce->value) {
-			val = ce->value;
+			*proxy_url = git__strdup(ce->value);
 			goto found;
 		}
 	}
@@ -797,19 +797,28 @@ int git_remote__get_http_proxy(git_remote *remote, bool use_ssl, char **proxy_ur
 	/* http.proxy config setting */
 	if ((error = git_config__lookup_entry(&ce, cfg, "http.proxy", false)) < 0)
 		return error;
+
 	if (ce && ce->value) {
-		val = ce->value;
+		*proxy_url = git__strdup(ce->value);
 		goto found;
 	}
 
 	/* HTTP_PROXY / HTTPS_PROXY environment variables */
-	val = use_ssl ? getenv("HTTPS_PROXY") : getenv("HTTP_PROXY");
+	error = git__getenv(&val, use_ssl ? "HTTPS_PROXY" : "HTTP_PROXY");
 
-found:
-	if (val && val[0]) {
-		*proxy_url = git__strdup(val);
-		GITERR_CHECK_ALLOC(*proxy_url);
+	if (error < 0) {
+		if (error == GIT_ENOTFOUND) {
+			giterr_clear();
+			error = 0;
+		}
+
+		return error;
 	}
+
+	*proxy_url = git_buf_detach(&val);
+
+found:
+	GITERR_CHECK_ALLOC(*proxy_url);
 	git_config_entry_free(ce);
 
 	return 0;
diff --git a/src/sysdir.c b/src/sysdir.c
index cd94a8b..2795de4 100644
--- a/src/sysdir.c
+++ b/src/sysdir.c
@@ -29,7 +29,14 @@ static int git_sysdir_guess_global_dirs(git_buf *out)
 #ifdef GIT_WIN32
 	return git_win32__find_global_dirs(out);
 #else
-	return git_buf_sets(out, getenv("HOME"));
+	int error = git__getenv(out, "HOME");
+
+	if (error == GIT_ENOTFOUND) {
+		giterr_clear();
+		error = 0;
+	}
+
+	return error;
 #endif
 }
 
@@ -38,15 +45,22 @@ static int git_sysdir_guess_xdg_dirs(git_buf *out)
 #ifdef GIT_WIN32
 	return git_win32__find_xdg_dirs(out);
 #else
-	const char *env = NULL;
+	git_buf env = GIT_BUF_INIT;
+	int error;
 
-	if ((env = getenv("XDG_CONFIG_HOME")) != NULL)
-		return git_buf_joinpath(out, env, "git");
-	else if ((env = getenv("HOME")) != NULL)
-		return git_buf_joinpath(out, env, ".config/git");
+	if ((error = git__getenv(&env, "XDG_CONFIG_HOME")) == 0)
+		error = git_buf_joinpath(out, env.ptr, "git");
 
-	git_buf_clear(out);
-	return 0;
+	if (error == GIT_ENOTFOUND && (error = git__getenv(&env, "HOME")) == 0)
+		error = git_buf_joinpath(out, env.ptr, ".config/git");
+
+	if (error == GIT_ENOTFOUND) {
+		giterr_clear();
+		error = 0;
+	}
+
+	git_buf_free(&env);
+	return error;
 #endif
 }
 
diff --git a/src/util.c b/src/util.c
index c628264..b08b2b8 100644
--- a/src/util.c
+++ b/src/util.c
@@ -10,6 +10,10 @@
 #include <ctype.h>
 #include "posix.h"
 
+#ifdef GIT_WIN32
+# include "win32/buffer.h"
+#endif
+
 #ifdef _MSC_VER
 # include <Shlwapi.h>
 #endif
@@ -765,3 +769,47 @@ int git__utf8_iterate(const uint8_t *str, int str_len, int32_t *dst)
 	*dst = uc;
 	return length;
 }
+
+#ifdef GIT_WIN32
+int git__getenv(git_buf *out, const char *name)
+{
+	wchar_t *wide_name = NULL, *wide_value = NULL;
+	DWORD value_len;
+	int error = -1;
+
+	git_buf_clear(out);
+
+	if (git__utf8_to_16_alloc(&wide_name, name) < 0)
+		return -1;
+
+	if ((value_len = GetEnvironmentVariableW(wide_name, NULL, 0)) > 0) {
+		wide_value = git__malloc(value_len * sizeof(wchar_t));
+		GITERR_CHECK_ALLOC(wide_value);
+
+		value_len = GetEnvironmentVariableW(wide_name, wide_value, value_len);
+	}
+
+	if (value_len)
+		error = git_buf_put_w(out, wide_value, value_len);
+	else if (GetLastError() == ERROR_ENVVAR_NOT_FOUND)
+		error = GIT_ENOTFOUND;
+	else
+		giterr_set(GITERR_OS, "could not read environment variable '%s'", name);
+
+	git__free(wide_name);
+	git__free(wide_value);
+	return error;
+}
+#else
+int git__getenv(git_buf *out, const char *name)
+{
+	const char *val = getenv(name);
+
+	git_buf_clear(out);
+
+	if (!val)
+		return GIT_ENOTFOUND;
+
+	return git_buf_puts(out, val);
+}
+#endif
diff --git a/src/util.h b/src/util.h
index b2abbe6..458b0db 100644
--- a/src/util.h
+++ b/src/util.h
@@ -7,6 +7,9 @@
 #ifndef INCLUDE_util_h__
 #define INCLUDE_util_h__
 
+#include "git2/buffer.h"
+#include "buffer.h"
+
 #if defined(GIT_MSVC_CRTDBG)
 /* Enable MSVC CRTDBG memory leak reporting.
  *
@@ -596,4 +599,6 @@ GIT_INLINE(double) git__timer(void)
 
 #endif
 
+extern int git__getenv(git_buf *out, const char *name);
+
 #endif /* INCLUDE_util_h__ */
diff --git a/src/win32/posix_w32.c b/src/win32/posix_w32.c
index 504562b..c909af6 100644
--- a/src/win32/posix_w32.c
+++ b/src/win32/posix_w32.c
@@ -11,6 +11,8 @@
 #include "utf-conv.h"
 #include "repository.h"
 #include "reparse.h"
+#include "global.h"
+#include "buffer.h"
 #include <errno.h>
 #include <io.h>
 #include <fcntl.h>
diff --git a/tests/clar_libgit2.c b/tests/clar_libgit2.c
index dabc47a..f73fc5b 100644
--- a/tests/clar_libgit2.c
+++ b/tests/clar_libgit2.c
@@ -58,31 +58,38 @@ void cl_git_rmfile(const char *filename)
 	cl_must_pass(p_unlink(filename));
 }
 
-#ifdef GIT_WIN32
-
-#include "win32/utf-conv.h"
-
 char *cl_getenv(const char *name)
 {
-	wchar_t *wide_name, *wide_value;
-	char *utf8_value = NULL;
-	DWORD value_len;
+	git_buf out = GIT_BUF_INIT;
+	int error = git__getenv(&out, name);
 
-	cl_assert(git__utf8_to_16_alloc(&wide_name, name) >= 0);
+	cl_assert(error >= 0 || error == GIT_ENOTFOUND);
 
-	value_len = GetEnvironmentVariableW(wide_name, NULL, 0);
+	if (error == GIT_ENOTFOUND)
+		return NULL;
 
-	if (value_len) {
-		cl_assert(wide_value = git__malloc(value_len * sizeof(wchar_t)));
-		cl_assert(GetEnvironmentVariableW(wide_name, wide_value, value_len));
-		cl_assert(git__utf16_to_8_alloc(&utf8_value, wide_value) >= 0);
-		git__free(wide_value);
+	if (out.size == 0) {
+		char *dup = git__strdup("");
+		cl_assert(dup);
+
+		return dup;
 	}
 
-	git__free(wide_name);
-	return utf8_value;
+	return git_buf_detach(&out);
 }
 
+bool cl_is_env_set(const char *name)
+{
+	char *env = cl_getenv(name);
+	bool result = (env != NULL);
+	git__free(env);
+	return result;
+}
+
+#ifdef GIT_WIN32
+
+#include "win32/utf-conv.h"
+
 int cl_setenv(const char *name, const char *value)
 {
 	wchar_t *wide_name, *wide_value = NULL;
@@ -138,10 +145,6 @@ int cl_rename(const char *source, const char *dest)
 #else
 
 #include <stdlib.h>
-char *cl_getenv(const char *name)
-{
-	return getenv(name);
-}
 
 int cl_setenv(const char *name, const char *value)
 {
diff --git a/tests/clar_libgit2.h b/tests/clar_libgit2.h
index 9ab0da4..d7e6353 100644
--- a/tests/clar_libgit2.h
+++ b/tests/clar_libgit2.h
@@ -119,6 +119,7 @@ bool cl_is_chmod_supported(void);
 
 /* Environment wrappers */
 char *cl_getenv(const char *name);
+bool cl_is_env_set(const char *name);
 int cl_setenv(const char *name, const char *value);
 
 /* Reliable rename */
diff --git a/tests/core/env.c b/tests/core/env.c
index 293b786..ee08258 100644
--- a/tests/core/env.c
+++ b/tests/core/env.c
@@ -30,14 +30,8 @@ static char *home_values[] = {
 void test_core_env__initialize(void)
 {
 	int i;
-	for (i = 0; i < NUM_VARS; ++i) {
-		const char *original = cl_getenv(env_vars[i]);
-#ifdef GIT_WIN32
-		env_save[i] = (char *)original;
-#else
-		env_save[i] = original ? git__strdup(original) : NULL;
-#endif
-	}
+	for (i = 0; i < NUM_VARS; ++i)
+		env_save[i] = cl_getenv(env_vars[i]);
 }
 
 static void set_global_search_path_from_env(void)
@@ -77,12 +71,14 @@ static void setenv_and_check(const char *name, const char *value)
 	char *check;
 
 	cl_git_pass(cl_setenv(name, value));
-
 	check = cl_getenv(name);
-	cl_assert_equal_s(value, check);
-#ifdef GIT_WIN32
+
+	if (value)
+		cl_assert_equal_s(value, check);
+	else
+		cl_assert(check == NULL);
+
 	git__free(check);
-#endif
 }
 
 void test_core_env__0(void)
diff --git a/tests/core/ftruncate.c b/tests/core/ftruncate.c
index 21981d6..2f4729f 100644
--- a/tests/core/ftruncate.c
+++ b/tests/core/ftruncate.c
@@ -10,7 +10,7 @@ static int fd = -1;
 
 void test_core_ftruncate__initialize(void)
 {
-	if (!cl_getenv("GITTEST_INVASIVE_FS_SIZE"))
+	if (!cl_is_env_set("GITTEST_INVASIVE_FS_SIZE"))
 		cl_skip();
 
 	cl_must_pass((fd = p_open(filename, O_CREAT | O_RDWR, 0644)));
diff --git a/tests/filter/stream.c b/tests/filter/stream.c
index 603f194..9228911 100644
--- a/tests/filter/stream.c
+++ b/tests/filter/stream.c
@@ -214,7 +214,7 @@ void test_filter_stream__smallfile(void)
 /* optionally write a 500 MB file through the compression stream */
 void test_filter_stream__bigfile(void)
 {
-	if (!cl_getenv("GITTEST_INVASIVE_FS_SIZE"))
+	if (!cl_is_env_set("GITTEST_INVASIVE_FS_SIZE"))
 		cl_skip();
 
 	test_stream(51200);
diff --git a/tests/online/clone.c b/tests/online/clone.c
index e63cf55..225b3ab 100644
--- a/tests/online/clone.c
+++ b/tests/online/clone.c
@@ -17,6 +17,15 @@
 static git_repository *g_repo;
 static git_clone_options g_options;
 
+static char *_remote_url = NULL;
+static char *_remote_user = NULL;
+static char *_remote_pass = NULL;
+static char *_remote_ssh_pubkey = NULL;
+static char *_remote_ssh_privkey = NULL;
+static char *_remote_ssh_passphrase = NULL;
+static char *_remote_ssh_fingerprint = NULL;
+
+
 void test_online_clone__initialize(void)
 {
 	git_checkout_options dummy_opts = GIT_CHECKOUT_OPTIONS_INIT;
@@ -29,6 +38,14 @@ void test_online_clone__initialize(void)
 	g_options.checkout_opts = dummy_opts;
 	g_options.checkout_opts.checkout_strategy = GIT_CHECKOUT_SAFE;
 	g_options.fetch_opts = dummy_fetch;
+
+	_remote_url = cl_getenv("GITTEST_REMOTE_URL");
+	_remote_user = cl_getenv("GITTEST_REMOTE_USER");
+	_remote_pass = cl_getenv("GITTEST_REMOTE_PASS");
+	_remote_ssh_pubkey = cl_getenv("GITTEST_REMOTE_SSH_PUBKEY");
+	_remote_ssh_privkey = cl_getenv("GITTEST_REMOTE_SSH_KEY");
+	_remote_ssh_passphrase = cl_getenv("GITTEST_REMOTE_SSH_PASSPHRASE");
+	_remote_ssh_fingerprint = cl_getenv("GITTEST_REMOTE_SSH_FINGERPRINT");
 }
 
 void test_online_clone__cleanup(void)
@@ -38,6 +55,14 @@ void test_online_clone__cleanup(void)
 		g_repo = NULL;
 	}
 	cl_fixture_cleanup("./foo");
+
+	git__free(_remote_url);
+	git__free(_remote_user);
+	git__free(_remote_pass);
+	git__free(_remote_ssh_pubkey);
+	git__free(_remote_ssh_privkey);
+	git__free(_remote_ssh_passphrase);
+	git__free(_remote_ssh_fingerprint);
 }
 
 void test_online_clone__network_full(void)
@@ -202,15 +227,12 @@ static int cred_failure_cb(
 
 void test_online_clone__cred_callback_failure_return_code_is_tunnelled(void)
 {
-	const char *remote_url = cl_getenv("GITTEST_REMOTE_URL");
-	const char *remote_user = cl_getenv("GITTEST_REMOTE_USER");
-
-	if (!remote_url || !remote_user)
+	if (!_remote_url || !_remote_user)
 		clar__skip();
 
 	g_options.fetch_opts.callbacks.credentials = cred_failure_cb;
 
-	cl_git_fail_with(-172, git_clone(&g_repo, remote_url, "./foo", &g_options));
+	cl_git_fail_with(-172, git_clone(&g_repo, _remote_url, "./foo", &g_options));
 }
 
 static int cred_count_calls_cb(git_cred **cred, const char *url, const char *user,
@@ -233,17 +255,15 @@ static int cred_count_calls_cb(git_cred **cred, const char *url, const char *use
 
 void test_online_clone__cred_callback_called_again_on_auth_failure(void)
 {
-	const char *remote_url = cl_getenv("GITTEST_REMOTE_URL");
-	const char *remote_user = cl_getenv("GITTEST_REMOTE_USER");
 	size_t counter = 0;
 
-	if (!remote_url || !remote_user)
+	if (!_remote_url || !_remote_user)
 		clar__skip();
 
 	g_options.fetch_opts.callbacks.credentials = cred_count_calls_cb;
 	g_options.fetch_opts.callbacks.payload = &counter;
 
-	cl_git_fail_with(GIT_EUSER, git_clone(&g_repo, remote_url, "./foo", &g_options));
+	cl_git_fail_with(GIT_EUSER, git_clone(&g_repo, _remote_url, "./foo", &g_options));
 	cl_assert_equal_i(3, counter);
 }
 
@@ -269,22 +289,22 @@ void test_online_clone__credentials(void)
 	/* Remote URL environment variable must be set.
 	 * User and password are optional.
 	 */
-	const char *remote_url = cl_getenv("GITTEST_REMOTE_URL");
 	git_cred_userpass_payload user_pass = {
-		cl_getenv("GITTEST_REMOTE_USER"),
-		cl_getenv("GITTEST_REMOTE_PASS")
+		_remote_user,
+		_remote_pass
 	};
 
-	if (!remote_url) return;
+	if (!_remote_url)
+		clar__skip();
 
-	if (cl_getenv("GITTEST_REMOTE_DEFAULT")) {
+	if (cl_is_env_set("GITTEST_REMOTE_DEFAULT")) {
 		g_options.fetch_opts.callbacks.credentials = cred_default;
 	} else {
 		g_options.fetch_opts.callbacks.credentials = git_cred_userpass;
 		g_options.fetch_opts.callbacks.payload = &user_pass;
 	}
 
-	cl_git_pass(git_clone(&g_repo, remote_url, "./foo", &g_options));
+	cl_git_pass(git_clone(&g_repo, _remote_url, "./foo", &g_options));
 	git_repository_free(g_repo); g_repo = NULL;
 	cl_fixture_cleanup("./foo");
 }
@@ -335,18 +355,15 @@ void test_online_clone__can_cancel(void)
 static int cred_cb(git_cred **cred, const char *url, const char *user_from_url,
 		   unsigned int allowed_types, void *payload)
 {
-	const char *remote_user = cl_getenv("GITTEST_REMOTE_USER");
-	const char *pubkey = cl_getenv("GITTEST_REMOTE_SSH_PUBKEY");
-	const char *privkey = cl_getenv("GITTEST_REMOTE_SSH_KEY");
-	const char *passphrase = cl_getenv("GITTEST_REMOTE_SSH_PASSPHRASE");
-
 	GIT_UNUSED(url); GIT_UNUSED(user_from_url); GIT_UNUSED(payload);
 
 	if (allowed_types & GIT_CREDTYPE_USERNAME)
-		return git_cred_username_new(cred, remote_user);
+		return git_cred_username_new(cred, _remote_user);
 
 	if (allowed_types & GIT_CREDTYPE_SSH_KEY)
-		return git_cred_ssh_key_new(cred, remote_user, pubkey, privkey, passphrase);
+		return git_cred_ssh_key_new(cred,
+			_remote_user, _remote_ssh_pubkey,
+			_remote_ssh_privkey, _remote_ssh_passphrase);
 
 	giterr_set(GITERR_NET, "unexpected cred type");
 	return -1;
@@ -417,13 +434,10 @@ void test_online_clone__ssh_with_paths(void)
 		2,
 	};
 
-	const char *remote_url = cl_getenv("GITTEST_REMOTE_URL");
-	const char *remote_user = cl_getenv("GITTEST_REMOTE_USER");
-
 #ifndef GIT_SSH
 	clar__skip();
 #endif
-	if (!remote_url || !remote_user || strncmp(remote_url, "ssh://", 5) != 0)
+	if (!_remote_url || !_remote_user || strncmp(_remote_url, "ssh://", 5) != 0)
 		clar__skip();
 
 	g_options.remote_cb = custom_remote_ssh_with_paths;
@@ -431,10 +445,10 @@ void test_online_clone__ssh_with_paths(void)
 	g_options.fetch_opts.callbacks.credentials = cred_cb;
 	g_options.fetch_opts.callbacks.payload = &arr;
 
-	cl_git_fail(git_clone(&g_repo, remote_url, "./foo", &g_options));
+	cl_git_fail(git_clone(&g_repo, _remote_url, "./foo", &g_options));
 
 	arr.strings = good_paths;
-	cl_git_pass(git_clone(&g_repo, remote_url, "./foo", &g_options));
+	cl_git_pass(git_clone(&g_repo, _remote_url, "./foo", &g_options));
 }
 
 static int cred_foo_bar(git_cred **cred, const char *url, const char *username_from_url,
@@ -460,15 +474,13 @@ int ssh_certificate_check(git_cert *cert, int valid, const char *host, void *pay
 {
 	git_cert_hostkey *key;
 	git_oid expected = {{0}}, actual = {{0}};
-	const char *expected_str;
 
 	GIT_UNUSED(valid);
 	GIT_UNUSED(payload);
 
-	expected_str = cl_getenv("GITTEST_REMOTE_SSH_FINGERPRINT");
-	cl_assert(expected_str);
+	cl_assert(_remote_ssh_fingerprint);
 
-	cl_git_pass(git_oid_fromstrp(&expected, expected_str));
+	cl_git_pass(git_oid_fromstrp(&expected, _remote_ssh_fingerprint));
 	cl_assert_equal_i(GIT_CERT_HOSTKEY_LIBSSH2, cert->cert_type);
 	key = (git_cert_hostkey *) cert;
 
@@ -477,9 +489,9 @@ int ssh_certificate_check(git_cert *cert, int valid, const char *host, void *pay
 	 * the type. Here we abuse the fact that both hashes fit into
 	 * our git_oid type.
 	 */
-	if (strlen(expected_str) == 32 && key->type & GIT_CERT_SSH_MD5) {
+	if (strlen(_remote_ssh_fingerprint) == 32 && key->type & GIT_CERT_SSH_MD5) {
 		memcpy(&actual.id, key->hash_md5, 16);
-	} else 	if (strlen(expected_str) == 40 && key->type & GIT_CERT_SSH_SHA1) {
+	} else 	if (strlen(_remote_ssh_fingerprint) == 40 && key->type & GIT_CERT_SSH_SHA1) {
 		memcpy(&actual, key->hash_sha1, 20);
 	} else {
 		cl_fail("Cannot find a usable SSH hash");
@@ -496,7 +508,7 @@ void test_online_clone__ssh_cert(void)
 {
 	g_options.fetch_opts.callbacks.certificate_check = ssh_certificate_check;
 
-	if (!cl_getenv("GITTEST_REMOTE_SSH_FINGERPRINT"))
+	if (!_remote_ssh_fingerprint)
 		cl_skip();
 
 	cl_git_fail_with(GIT_EUSER, git_clone(&g_repo, "ssh://localhost/foo", "./foo", &g_options));
@@ -525,22 +537,17 @@ static char *read_key_file(const char *path)
 static int ssh_memory_cred_cb(git_cred **cred, const char *url, const char *user_from_url,
 		   unsigned int allowed_types, void *payload)
 {
-	const char *remote_user = cl_getenv("GITTEST_REMOTE_USER");
-	const char *pubkey_path = cl_getenv("GITTEST_REMOTE_SSH_PUBKEY");
-	const char *privkey_path = cl_getenv("GITTEST_REMOTE_SSH_KEY");
-	const char *passphrase = cl_getenv("GITTEST_REMOTE_SSH_PASSPHRASE");
-
 	GIT_UNUSED(url); GIT_UNUSED(user_from_url); GIT_UNUSED(payload);
 
 	if (allowed_types & GIT_CREDTYPE_USERNAME)
-		return git_cred_username_new(cred, remote_user);
+		return git_cred_username_new(cred, _remote_user);
 
 	if (allowed_types & GIT_CREDTYPE_SSH_KEY)
 	{
-		char *pubkey = read_key_file(pubkey_path);
-		char *privkey = read_key_file(privkey_path);
+		char *pubkey = read_key_file(_remote_ssh_pubkey);
+		char *privkey = read_key_file(_remote_ssh_privkey);
 
-		int ret = git_cred_ssh_key_memory_new(cred, remote_user, pubkey, privkey, passphrase);
+		int ret = git_cred_ssh_key_memory_new(cred, _remote_user, pubkey, privkey, _remote_ssh_passphrase);
 
 		if (privkey)
 			free(privkey);
@@ -555,19 +562,15 @@ static int ssh_memory_cred_cb(git_cred **cred, const char *url, const char *user
 
 void test_online_clone__ssh_memory_auth(void)
 {
-	const char *remote_url = cl_getenv("GITTEST_REMOTE_URL");
-	const char *remote_user = cl_getenv("GITTEST_REMOTE_USER");
-	const char *privkey = cl_getenv("GITTEST_REMOTE_SSH_KEY");
-
 #ifndef GIT_SSH_MEMORY_CREDENTIALS
 	clar__skip();
 #endif
-	if (!remote_url || !remote_user || !privkey || strncmp(remote_url, "ssh://", 5) != 0)
+	if (!_remote_url || !_remote_user || !_remote_ssh_privkey || strncmp(_remote_url, "ssh://", 5) != 0)
 		clar__skip();
 
 	g_options.fetch_opts.callbacks.credentials = ssh_memory_cred_cb;
 
-	cl_git_pass(git_clone(&g_repo, remote_url, "./foo", &g_options));
+	cl_git_pass(git_clone(&g_repo, _remote_url, "./foo", &g_options));
 }
 
 void test_online_clone__url_with_no_path_returns_EINVALIDSPEC(void)
diff --git a/tests/online/push.c b/tests/online/push.c
index 6cd4443..0b0892c 100644
--- a/tests/online/push.c
+++ b/tests/online/push.c
@@ -9,16 +9,16 @@
 
 static git_repository *_repo;
 
-static char *_remote_url;
+static char *_remote_url = NULL;
 
-static char *_remote_ssh_key;
-static char *_remote_ssh_pubkey;
-static char *_remote_ssh_passphrase;
+static char *_remote_user = NULL;
+static char *_remote_pass = NULL;
 
-static char *_remote_user;
-static char *_remote_pass;
+static char *_remote_ssh_key = NULL;
+static char *_remote_ssh_pubkey = NULL;
+static char *_remote_ssh_passphrase = NULL;
 
-static char *_remote_default;
+static char *_remote_default = NULL;
 
 static int cred_acquire_cb(git_cred **,	const char *, const char *, unsigned int, void *);
 
@@ -355,6 +355,7 @@ void test_online_push__initialize(void)
 	git_oid_fromstr(&_tag_tag, "eea4f2705eeec2db3813f2430829afce99cd00b5");
 
 	/* Remote URL environment variable must be set.  User and password are optional.  */
+
 	_remote_url = cl_getenv("GITTEST_REMOTE_URL");
 	_remote_user = cl_getenv("GITTEST_REMOTE_USER");
 	_remote_pass = cl_getenv("GITTEST_REMOTE_PASS");
@@ -406,6 +407,14 @@ void test_online_push__cleanup(void)
 		git_remote_free(_remote);
 	_remote = NULL;
 
+	git__free(_remote_url);
+	git__free(_remote_user);
+	git__free(_remote_pass);
+	git__free(_remote_ssh_key);
+	git__free(_remote_ssh_pubkey);
+	git__free(_remote_ssh_passphrase);
+	git__free(_remote_default);
+
 	/* Freed by cl_git_sandbox_cleanup */
 	_repo = NULL;
 
diff --git a/tests/repo/init.c b/tests/repo/init.c
index 525020f..929d741 100644
--- a/tests/repo/init.c
+++ b/tests/repo/init.c
@@ -713,7 +713,7 @@ void test_repo_init__at_filesystem_root(void)
 	git_buf root = GIT_BUF_INIT;
 	int root_len;
 
-	if (!cl_getenv("GITTEST_INVASIVE_FS_STRUCTURE"))
+	if (!cl_is_env_set("GITTEST_INVASIVE_FS_STRUCTURE"))
 		cl_skip();
 
 	root_len = git_path_root(sandbox);