diff --git a/tests/pexpects/eval-stack-overflow.py b/tests/pexpects/eval-stack-overflow.py
index da7fc832e..126ef2870 100644
--- a/tests/pexpects/eval-stack-overflow.py
+++ b/tests/pexpects/eval-stack-overflow.py
@@ -5,6 +5,10 @@ import os
 import platform
 import sys
 
+# Disable under SAN - keeps failing because the timing is too tight
+if "FISH_CI_SAN" in os.environ:
+    sys.exit(0)
+
 sp = SpawnedProc()
 send, sendline, sleep, expect_prompt, expect_re, expect_str = (
     sp.send,
@@ -19,7 +23,6 @@ expect_prompt()
 sendline("echo cat dog")
 expect_prompt("cat dog")
 
-sleep(0.5)
 sendline("eval (string replace dog tiger -- $history[1])")
 expect_prompt("cat tiger")