diff --git a/js/web/test/data/ops/multihead-attention.jsonc b/js/web/test/data/ops/multihead-attention.jsonc
index ed937a22c0b84..9ae866327b3f2 100644
--- a/js/web/test/data/ops/multihead-attention.jsonc
+++ b/js/web/test/data/ops/multihead-attention.jsonc
@@ -1073,5 +1073,80 @@
         ]
       }
     ]
+  },
+  {
+    "name": "MultiHeadAttention Basic, one head and head-size=1 with empty pastKey, pastValue inputs and optional presentKey, presentValue outputs",
+    "operator": "MultiHeadAttention",
+    "opset": { "domain": "com.microsoft", "version": 1 },
+    "attributes": [{ "name": "num_heads", "data": 1, "type": "int" }],
+    "cases": [
+      {
+        "name": "T[0]",
+        "inputs": [
+          // Q
+          {
+            "data": [1],
+            "dims": [1, 1, 1],
+            "type": "float32"
+          },
+          // K
+          {
+            "data": [2],
+            "dims": [1, 1, 1],
+            "type": "float32"
+          },
+          // V
+          {
+            "data": [3],
+            "dims": [1, 1, 1],
+            "type": "float32"
+          },
+          // Bias
+          {
+            "data": null,
+            "type": "float32"
+          },
+          // Mask
+          {
+            "data": null,
+            "type": "int32"
+          },
+          // AttentionBias
+          {
+            "data": null,
+            "type": "float32"
+          },
+          // PastKey
+          {
+            "data": [],
+            "dims": [1, 1, 0, 1],
+            "type": "float32"
+          },
+          // PastValue
+          {
+            "data": [],
+            "dims": [1, 1, 0, 1],
+            "type": "float32"
+          }
+        ],
+        "outputs": [
+          {
+            "data": [3],
+            "dims": [1, 1, 1],
+            "type": "float32"
+          },
+          {
+            "data": [2],
+            "dims": [1, 1, 1, 1],
+            "type": "float32"
+          },
+          {
+            "data": [3],
+            "dims": [1, 1, 1, 1],
+            "type": "float32"
+          }
+        ]
+      }
+    ]
   }
 ]