diff --git a/src/common/utils/selenium.py b/src/common/utils/selenium.py
index c836063..896c8c9 100644
--- a/src/common/utils/selenium.py
+++ b/src/common/utils/selenium.py
@@ -21,7 +21,7 @@ def until(condition: typing.Callable[[WebDriver], bool], watch=True):
 
 def sleep(seconds: float):
     from common.jsonrpc2.server import connection
-    assert connection is not None and connection.closed is not None
+    assert connection is not None and connection.closed is None
 
     try: WebDriverWait(driver, seconds, seconds).until(lambda _: False)
     except: pass