diff --git a/tests/wpt/mozilla/meta/MANIFEST.json b/tests/wpt/mozilla/meta/MANIFEST.json
index 521b124962b..f5bcd405ee8 100644
--- a/tests/wpt/mozilla/meta/MANIFEST.json
+++ b/tests/wpt/mozilla/meta/MANIFEST.json
@@ -14731,6 +14731,13 @@
       null,
       {}
      ]
+    ],
+    "sessionavailable.html": [
+     "dd9a071d05c4d696471be87428c12cea573cba60",
+     [
+      null,
+      {}
+     ]
     ]
    }
   }
diff --git a/tests/wpt/mozilla/meta/webxr/sessionavailable.html.ini b/tests/wpt/mozilla/meta/webxr/sessionavailable.html.ini
new file mode 100644
index 00000000000..8bf6ba72fd8
--- /dev/null
+++ b/tests/wpt/mozilla/meta/webxr/sessionavailable.html.ini
@@ -0,0 +1,2 @@
+prefs: [dom.webxr.sessionavailable:true]
+
diff --git a/tests/wpt/mozilla/tests/webxr/sessionavailable.html b/tests/wpt/mozilla/tests/webxr/sessionavailable.html
new file mode 100644
index 00000000000..dd9a071d05c
--- /dev/null
+++ b/tests/wpt/mozilla/tests/webxr/sessionavailable.html
@@ -0,0 +1,20 @@
+<!DOCTYPE html>
+<body>
+  <script src=/resources/testharness.js></script>
+  <script src=/resources/testharnessreport.js></script>
+  <script src="./resources/webxr-util.js"></script>
+  <script>
+    navigator.xr.test.simulateDeviceConnection({
+      supportedModes: ["immersive-vr"],
+      views: TEST_VIEWS,
+    });
+    async_test((t) => {
+      navigator.xr.addEventListener("sessionavailable", (evt) => {
+        navigator.xr.requestSession("immersive-vr")
+          .then((session) => {
+            t.done();
+          })
+      });
+    }, "Requesting immersive session in a sessionavailable handler should succeed");
+  </script>
+</body>
