diff --git a/package-lock.json b/package-lock.json
index 544ca416..72e872b8 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -22,7 +22,7 @@
         "@tsconfig/strictest": "^2.0.2",
         "@types/node": "^20.8.6",
         "esbuild": "0.19.5",
-        "tsx": "^3.13.0",
+        "tsx": "^3.14.0",
         "typescript": "^5.2.2"
       },
       "engines": {
@@ -741,9 +741,9 @@
       "integrity": "sha512-AEYxH93jGFPn/a2iVAwW87VuUIkR1FVUKB77NwMF7nBTDkDrrT/Hpt/IrCJ0QXhW27jTBDcf5ZY7w6RiqTMw2Q=="
     },
     "node_modules/tsx": {
-      "version": "3.13.0",
-      "resolved": "https://registry.npmjs.org/tsx/-/tsx-3.13.0.tgz",
-      "integrity": "sha512-rjmRpTu3as/5fjNq/kOkOtihgLxuIz6pbKdj9xwP4J5jOLkBxw/rjN5ANw+KyrrOXV5uB7HC8+SrrSJxT65y+A==",
+      "version": "3.14.0",
+      "resolved": "https://registry.npmjs.org/tsx/-/tsx-3.14.0.tgz",
+      "integrity": "sha512-xHtFaKtHxM9LOklMmJdI3BEnQq/D5F73Of2E1GDrITi9sgoVkvIsrQUTY1G8FlmGtA+awCI4EBlTRRYxkL2sRg==",
       "dev": true,
       "dependencies": {
         "esbuild": "~0.18.20",
@@ -1647,9 +1647,9 @@
       "integrity": "sha512-AEYxH93jGFPn/a2iVAwW87VuUIkR1FVUKB77NwMF7nBTDkDrrT/Hpt/IrCJ0QXhW27jTBDcf5ZY7w6RiqTMw2Q=="
     },
     "tsx": {
-      "version": "3.13.0",
-      "resolved": "https://registry.npmjs.org/tsx/-/tsx-3.13.0.tgz",
-      "integrity": "sha512-rjmRpTu3as/5fjNq/kOkOtihgLxuIz6pbKdj9xwP4J5jOLkBxw/rjN5ANw+KyrrOXV5uB7HC8+SrrSJxT65y+A==",
+      "version": "3.14.0",
+      "resolved": "https://registry.npmjs.org/tsx/-/tsx-3.14.0.tgz",
+      "integrity": "sha512-xHtFaKtHxM9LOklMmJdI3BEnQq/D5F73Of2E1GDrITi9sgoVkvIsrQUTY1G8FlmGtA+awCI4EBlTRRYxkL2sRg==",
       "dev": true,
       "requires": {
         "esbuild": "~0.18.20",
diff --git a/package.json b/package.json
index a039e5c5..a1eb454b 100644
--- a/package.json
+++ b/package.json
@@ -35,7 +35,7 @@
     "@tsconfig/strictest": "^2.0.2",
     "@types/node": "^20.8.6",
     "esbuild": "0.19.5",
-    "tsx": "^3.13.0",
+    "tsx": "^3.14.0",
     "typescript": "^5.2.2"
   }
 }
diff --git a/scripts/run_tests.ts b/scripts/run_tests.ts
index 4c130c95..61b0bcb3 100755
--- a/scripts/run_tests.ts
+++ b/scripts/run_tests.ts
@@ -7,7 +7,7 @@ const testPaths = dirEnts.flatMap((dirent) => dirent.name.endsWith('.test.ts') ?
 
 console.log('Starting to run tests for', testPaths);
 
-execFileSync('node', ['--loader', 'tsx', '--no-warnings', '--test', ...testPaths], {
+execFileSync('node', ['--import', 'tsx', '--no-warnings', '--test', ...testPaths], {
   // preserving color: https://github.com/nodejs/help/issues/2183#issuecomment-532362821
   stdio: 'inherit',
 });