diff --git a/utils/phpstan_tunables.php b/utils/phpstan_tunables.php
new file mode 100644
index 000000000..7d5d8f03a
--- /dev/null
+++ b/utils/phpstan_tunables.php
@@ -0,0 +1,44 @@
+<?php
+	/*
+	this is only needed because PHPStan can't figure out define_default()
+	this file isn't sourced anywhere and only used for development
+	*/
+
+	define('SINGLE_USER_MODE', rand() % 2);
+	define('LOCK_DIRECTORY', 'lock');
+
+	define('FEED_FETCH_TIMEOUT', 45);
+	// How may seconds to wait for response when requesting feed from a site
+	define('FEED_FETCH_NO_CACHE_TIMEOUT', 15);
+	// How may seconds to wait for response when requesting feed from a
+	// site when that feed wasn't cached before
+	define('FILE_FETCH_TIMEOUT', 45);
+	// Default timeout when fetching files from remote sites
+	define('FILE_FETCH_CONNECT_TIMEOUT', 15);
+	// How many seconds to wait for initial response from website when
+	// fetching files from remote sites
+	define('DAEMON_UPDATE_LOGIN_LIMIT', 30);
+	// stop updating feeds if users haven't logged in for X days
+	define('DAEMON_FEED_LIMIT', 500);
+	// feed limit for one update batch
+	define('DAEMON_SLEEP_INTERVAL', 120);
+	// default sleep interval between feed updates (sec)
+	define('MAX_CACHE_FILE_SIZE', 64*1024*1024);
+	// do not cache files larger than that (bytes)
+	define('MAX_DOWNLOAD_FILE_SIZE', 16*1024*1024);
+	// do not download general files larger than that (bytes)
+	define('CACHE_MAX_DAYS', 7);
+	// max age in days for various automatically cached (temporary) files
+	define('MAX_CONDITIONAL_INTERVAL', 3600*12);
+	// max interval between forced unconditional updates for servers
+	// not complying with http if-modified-since (seconds)
+	// define('MAX_FETCH_REQUESTS_PER_HOST', 25);
+	// a maximum amount of allowed HTTP requests per destination host
+	// during a single update (i.e. within PHP process lifetime)
+	// this is used to not cause excessive load on the origin server on
+	// e.g. feed subscription when all articles are being processes
+	// (not implemented)
+	define('DAEMON_UNSUCCESSFUL_DAYS_LIMIT', 30);
+	// automatically disable updates for feeds which failed to
+	// update for this amount of days; 0 disables
+