diff --git a/crates/base/test_cases/user-worker-san-check/.blocklisted b/crates/base/test_cases/user-worker-san-check/.blocklisted
index 2f8c4d7c5..1a343f9d9 100644
--- a/crates/base/test_cases/user-worker-san-check/.blocklisted
+++ b/crates/base/test_cases/user-worker-san-check/.blocklisted
@@ -23,11 +23,9 @@ link
 linkSync
 lstat
 lstatSync
-makeTempDir
 makeTempDirSync
 makeTempFile
 makeTempFileSync
-mkdir
 mkdirSync
 openSync
 readDir
diff --git a/crates/sb_core/js/bootstrap.js b/crates/sb_core/js/bootstrap.js
index 1cab777bb..3129517c9 100644
--- a/crates/sb_core/js/bootstrap.js
+++ b/crates/sb_core/js/bootstrap.js
@@ -534,6 +534,8 @@ globalThis.bootstrapSBEdge = (opts, extraCtx) => {
 			'writeTextFile': true,
 			'readFile': true,
 			'readTextFile': true,
+			'mkdir': true,
+			'makeTempDir': true,
 
 			'kill': MOCK_FN,
 			'exit': MOCK_FN,