@@ -563,13 +563,26 @@ def test_get(self):
             webbrowser.get('fakebrowser')
         self.assertIsNotNone(webbrowser._tryorder)
 
-    @unittest.skipIf(" " in sys.executable, "test assumes no space in path (GH-114452)")
     def test_synthesize(self):
         webbrowser = import_helper.import_fresh_module('webbrowser')
         name = os.path.basename(sys.executable).lower()
         webbrowser.register(name, None, webbrowser.GenericBrowser(name))
         webbrowser.get(sys.executable)
 
+    def test_synthesize_space_in_path(self):
+        webbrowser = import_helper.import_fresh_module('webbrowser')
+        name = os.path.basename(sys.executable)
+        webbrowser.register(name, None, webbrowser.GenericBrowser(name))
+        with os_helper.temp_dir() as directory:
+            directory = os.path.join(directory, 'with spaces')
+            os.mkdir(directory)
+            path = os.path.join(directory, name)
+            os_helper.create_empty_file(path)
+            os.chmod(path, 0o755)
+            controller = webbrowser.get(path)
+            self.assertIsInstance(controller, webbrowser.GenericBrowser)
+            self.assertEqual(controller.name, path)
+
     @unittest.skipIf(
         is_apple_mobile,
         "Apple mobile doesn't allow modifying browser with environment"
 
@@ -124,10 +124,9 @@ def _synthesize(browser, *, preferred=False):
     executable for the requested browser, return [None, None].
 
     """
-    cmd = browser.split()[0]
-    if not shutil.which(cmd):
+    if not shutil.which(browser):
         return [None, None]
-    name = os.path.basename(cmd)
+    name = os.path.basename(browser)
     try:
         command = _browsers[name.lower()]
     except KeyError:
 
@@ -0,0 +1,2 @@
+Fix :mod:`webbrowser` failing to find a registered browser when its executable
+path contains spaces.
Original file line number	Diff line number	Diff line change
`@@ -0,0 +1,2 @@`
	`1`	+Fix :mod:`webbrowser` failing to find a registered browser when its executable
	`2`	`+path contains spaces.`