diff --git a/build.zig b/build.zig
index 74a5f17f2f..f9bf6c9240 100644
--- a/build.zig
+++ b/build.zig
@@ -631,6 +631,7 @@ pub fn build(b: *std.Build) !void {
         .use_llvm = use_llvm,
         .use_lld = use_llvm,
         .zig_lib_dir = b.path("lib"),
+        .max_rss = 1,
     });
     if (link_libc) {
         unit_tests.root_module.link_libc = true;
diff --git a/test/tests.zig b/test/tests.zig
index 4ea42c2eb5..9bac037484 100644
--- a/test/tests.zig
+++ b/test/tests.zig
@@ -2595,6 +2595,7 @@ pub fn addCAbiTests(b: *std.Build, options: CAbiTestOptions) *Step {
                 .root_module = test_mod,
                 .use_llvm = c_abi_target.use_llvm,
                 .use_lld = c_abi_target.use_lld,
+                .max_rss = 1,
             });
 
             // This test is intentionally trying to check if the external ABI is