diff --git a/squirrelbattle/display/display.py b/squirrelbattle/display/display.py
index 1d70159..bd16344 100644
--- a/squirrelbattle/display/display.py
+++ b/squirrelbattle/display/display.py
@@ -71,7 +71,8 @@ class Display:
         """
         top_y, top_x = max(0, top_y), max(0, top_x)
         window_y, window_x = max(0, window_y), max(0, window_x)
-        screen_max_y, screen_max_x = self.screen.getmaxyx()
+        screen_max_y, screen_max_x = self.screen.getmaxyx() if self.screen \
+            else 42, 42
         last_y, last_x = min(screen_max_y - 1, last_y), \
             min(screen_max_x - 1, last_x)
 
diff --git a/squirrelbattle/tests/screen.py b/squirrelbattle/tests/screen.py
index 6eb2cd0..a6b3c9a 100644
--- a/squirrelbattle/tests/screen.py
+++ b/squirrelbattle/tests/screen.py
@@ -1,3 +1,6 @@
+from typing import Tuple
+
+
 class FakePad:
     """
     In order to run tests, we simulate a fake curses pad that accepts functions
@@ -10,8 +13,11 @@ class FakePad:
                 smincol: int, smaxrow: int, smaxcol: int) -> None:
         pass
 
-    def clear(self) -> None:
+    def erase(self) -> None:
         pass
 
     def resize(self, height: int, width: int) -> None:
         pass
+
+    def getmaxyx(self) -> Tuple[int, int]:
+        return 42, 42