diff --git a/internal/bundler_tests/bundler_loader_test.go b/internal/bundler_tests/bundler_loader_test.go
index bb096861b86..3ff10dd44c2 100644
--- a/internal/bundler_tests/bundler_loader_test.go
+++ b/internal/bundler_tests/bundler_loader_test.go
@@ -1299,7 +1299,8 @@ func TestWithTypeJSONOverrideLoader(t *testing.T) {
 		},
 		entryPaths: []string{"/entry.js"},
 		options: config.Options{
-			Mode: config.ModeBundle,
+			Mode:          config.ModeBundle,
+			AbsOutputFile: "/out.js",
 		},
 	})
 }
@@ -1314,7 +1315,8 @@ func TestWithTypeJSONOverrideLoaderGlob(t *testing.T) {
 		},
 		entryPaths: []string{"/entry.js"},
 		options: config.Options{
-			Mode: config.ModeBundle,
+			Mode:          config.ModeBundle,
+			AbsOutputFile: "/out.js",
 		},
 	})
 }
@@ -1383,6 +1385,7 @@ func TestEmptyLoaderJS(t *testing.T) {
 				".js":    config.LoaderJS,
 				".empty": config.LoaderEmpty,
 			},
+			AbsOutputFile: "/out.js",
 		},
 		expectedCompileLog: `entry.js: WARNING: Import "named" will always be undefined because the file "d.empty" has no exports
 `,
@@ -1408,6 +1411,7 @@ func TestEmptyLoaderCSS(t *testing.T) {
 				".css":   config.LoaderCSS,
 				".empty": config.LoaderEmpty,
 			},
+			AbsOutputFile: "/out.js",
 		},
 	})
 }
@@ -1427,6 +1431,7 @@ func TestExtensionlessLoaderJS(t *testing.T) {
 				".js": config.LoaderJS,
 				"":    config.LoaderJS,
 			},
+			AbsOutputFile: "/out.js",
 		},
 	})
 }
@@ -1446,6 +1451,7 @@ func TestExtensionlessLoaderCSS(t *testing.T) {
 				".css": config.LoaderCSS,
 				"":     config.LoaderCSS,
 			},
+			AbsOutputFile: "/out.js",
 		},
 	})
 }
diff --git a/internal/bundler_tests/bundler_test.go b/internal/bundler_tests/bundler_test.go
index 85b3d6e03d8..95b11a800d7 100644
--- a/internal/bundler_tests/bundler_test.go
+++ b/internal/bundler_tests/bundler_test.go
@@ -125,6 +125,9 @@ func (s *suite) __expectBundledImpl(t *testing.T, args bundled, fsKind fs.MockKi
 		if args.absWorkingDir == "" {
 			args.absWorkingDir = "/"
 		}
+		if args.options.AbsOutputDir == "" {
+			args.options.AbsOutputDir = args.absWorkingDir // Match the behavior of the API in this case
+		}
 
 		// Handle conversion to Windows-style paths
 		if fsKind == fs.MockWindows {
diff --git a/internal/bundler_tests/snapshots/snapshots_loader.txt b/internal/bundler_tests/snapshots/snapshots_loader.txt
index 36d14aabe59..4b1c0db1016 100644
--- a/internal/bundler_tests/snapshots/snapshots_loader.txt
+++ b/internal/bundler_tests/snapshots/snapshots_loader.txt
@@ -12,7 +12,7 @@ console.log(require_test());
 
 ================================================================================
 TestEmptyLoaderCSS
----------- entry.css.map ----------
+---------- /out.js.map ----------
 {
   "version": 3,
   "sources": ["entry.css"],
@@ -21,7 +21,7 @@ TestEmptyLoaderCSS
   "names": []
 }
 
----------- entry.css ----------
+---------- /out.js ----------
 /* entry.css */
 a {
   background: url();
@@ -54,13 +54,13 @@ a {
     }
   },
   "outputs": {
-    "entry.css.map": {
+    "out.js.map": {
       "imports": [],
       "exports": [],
       "inputs": {},
       "bytes": 203
     },
-    "entry.css": {
+    "out.js": {
       "imports": [
         {
           "path": "",
@@ -81,7 +81,7 @@ a {
 
 ================================================================================
 TestEmptyLoaderJS
----------- entry.js.map ----------
+---------- /out.js.map ----------
 {
   "version": 3,
   "sources": ["entry.js"],
@@ -90,7 +90,7 @@ TestEmptyLoaderJS
   "names": ["def"]
 }
 
----------- entry.js ----------
+---------- /out.js ----------
 // b.empty
 var require_b = __commonJS({
   "b.empty"() {
@@ -154,13 +154,13 @@ console.log(ns, import_c.default, void 0);
     }
   },
   "outputs": {
-    "entry.js.map": {
+    "out.js.map": {
       "imports": [],
       "exports": [],
       "inputs": {},
       "bytes": 377
     },
-    "entry.js": {
+    "out.js": {
       "imports": [],
       "exports": [],
       "entryPoint": "entry.js",
@@ -182,7 +182,7 @@ console.log(ns, import_c.default, void 0);
 
 ================================================================================
 TestExtensionlessLoaderCSS
----------- entry.css ----------
+---------- /out.js ----------
 /* what */
 .foo {
   color: red;
@@ -192,7 +192,7 @@ TestExtensionlessLoaderCSS
 
 ================================================================================
 TestExtensionlessLoaderJS
----------- entry.js ----------
+---------- /out.js ----------
 // what
 foo();
 
@@ -1115,7 +1115,7 @@ console.log(require_test());
 
 ================================================================================
 TestWithTypeJSONOverrideLoader
----------- entry.js ----------
+---------- /out.js ----------
 // foo.js
 var foo_default = { "this is json not js": true };
 
@@ -1124,7 +1124,7 @@ console.log(foo_default);
 
 ================================================================================
 TestWithTypeJSONOverrideLoaderGlob
----------- entry.js ----------
+---------- /out.js ----------
 // foo.js
 var foo_exports = {};
 __export(foo_exports, {