diff --git a/build.zig b/build.zig
index 964c180d757d74f39d7a2ba0f86dd27583ded0cc..c9dd27fe0326b64f2acf9b53e8ad427c756cb9cb 100644
--- a/build.zig
+++ b/build.zig
@@ -678,7 +678,7 @@ pub fn build(b: *std.Build) !void {
         .test_filters = test_filters,
         .test_target_filters = test_target_filters,
         .skip_wasm = skip_wasm,
-        .max_rss = 2_496_066_355,
+        .max_rss = 3_500_000_000,
     })) |test_libc_step| test_step.dependOn(test_libc_step);
 }
 
diff --git a/ci/x86_64-linux-debug-llvm.sh b/ci/x86_64-linux-debug-llvm.sh
index 6ef1b5a00939d8adfb1e2c52f555ce6593c03a25..26d3911c135b0bdbf91ae0004788349e1cdc998b 100755
--- a/ci/x86_64-linux-debug-llvm.sh
+++ b/ci/x86_64-linux-debug-llvm.sh
@@ -54,6 +54,7 @@ stage3-debug/bin/zig build \
 stage3-debug/bin/zig build test docs \
   --maxrss ${ZSF_MAX_RSS:-0} \
   -Dlldb=$HOME/deps/lldb-zig/Debug-e0a42bb34/bin/lldb \
+  -Dlibc-test-path=$HOME/deps/libc-test-f2bac77 \
   -fqemu \
   -fwasmtime \
   -Dstatic-llvm \
diff --git a/ci/x86_64-linux-release.sh b/ci/x86_64-linux-release.sh
index 99781406e273ffd10dccbe3e2f20d3fdda08b55c..94e6e93bbdc0f9fd5146c300624efb3f16a222c0 100755
--- a/ci/x86_64-linux-release.sh
+++ b/ci/x86_64-linux-release.sh
@@ -59,6 +59,7 @@ stage3-release/bin/zig build \
 stage3-release/bin/zig build test docs \
   --maxrss ${ZSF_MAX_RSS:-0} \
   -Dlldb=$HOME/deps/lldb-zig/Release-e0a42bb34/bin/lldb \
+  -Dlibc-test-path=$HOME/deps/libc-test-f2bac77 \
   -fqemu \
   -fwasmtime \
   -Dstatic-llvm \