diff --git a/build.zig b/build.zig
index 40b74b94b4..6a707621fc 100644
--- a/build.zig
+++ b/build.zig
@@ -615,8 +615,8 @@ pub fn build(b: *std.Build) !void {
         .optimize_modes = optimization_modes,
         .test_filters = test_filters,
         .test_target_filters = test_target_filters,
-        // Highest RSS observed in any test case was exactly 1465151488 on x86_64-linux CI.
-        .max_rss = 1758181785,
+        // Highest RSS observed in any test case was exactly 1802878976 on x86_64-linux.
+        .max_rss = 2253598720,
     })) |test_libc_step| test_step.dependOn(test_libc_step);
 }