diff --git a/smithy-protocol-tests/model/rpcv2Cbor/float16.smithy b/smithy-protocol-tests/model/rpcv2Cbor/float16.smithy
new file mode 100644
index 00000000000..a74682d63ed
--- /dev/null
+++ b/smithy-protocol-tests/model/rpcv2Cbor/float16.smithy
@@ -0,0 +1,94 @@
+$version: "2.0"
+
+namespace smithy.protocoltests.rpcv2Cbor
+
+use smithy.protocols#rpcv2Cbor
+use smithy.test#httpResponseTests
+
+// Verifies that clients can upcast float16s in responses.
+@tags(["client-only"])
+operation Float16 {
+    output: Float16Output
+}
+
+apply Float16 @httpResponseTests([
+    {
+        id: "RpcV2CborFloat16Inf",
+        documentation: "Ensures that clients can correctly parse float16 +Inf.",
+        protocol: rpcv2Cbor,
+        code: 200,
+        // https://cbor.nemo157.com/?type=hex&value=a16576616c7565f97c00
+        body: "oWV2YWx1Zfl8AA==",
+        headers: {
+            "smithy-protocol": "rpc-v2-cbor",
+            "Content-Type": "application/cbor"
+        },
+        params: { value: "Infinity" }
+        bodyMediaType: "application/cbor",
+        appliesTo: "client"
+    },
+    {
+        id: "RpcV2CborFloat16NegInf",
+        documentation: "Ensures that clients can correctly parse float16 -Inf.",
+        protocol: rpcv2Cbor,
+        code: 200,
+        // https://cbor.nemo157.com/?type=hex&value=a16576616c7565f9fc00
+        body: "oWV2YWx1Zfn8AA==",
+        headers: {
+            "smithy-protocol": "rpc-v2-cbor",
+            "Content-Type": "application/cbor"
+        },
+        params: { value: "-Infinity" }
+        bodyMediaType: "application/cbor",
+        appliesTo: "client"
+    },
+    {
+        id: "RpcV2CborFloat16LSBNaN",
+        documentation: "Ensures that clients can correctly parse float16 NaN with high LSB.",
+        protocol: rpcv2Cbor,
+        code: 200,
+        // https://cbor.nemo157.com/?type=hex&value=a16576616c7565f97c01
+        body: "oWV2YWx1Zfl8AQ==",
+        headers: {
+            "smithy-protocol": "rpc-v2-cbor",
+            "Content-Type": "application/cbor"
+        },
+        params: { value: "NaN" }
+        bodyMediaType: "application/cbor",
+        appliesTo: "client"
+    },
+    {
+        id: "RpcV2CborFloat16MSBNaN",
+        documentation: "Ensures that clients can correctly parse float16 NaN with high MSB.",
+        protocol: rpcv2Cbor,
+        code: 200,
+        // https://cbor.nemo157.com/?type=hex&value=a16576616c7565f97e00
+        body: "oWV2YWx1Zfl+AA==",
+        headers: {
+            "smithy-protocol": "rpc-v2-cbor",
+            "Content-Type": "application/cbor"
+        },
+        params: { value: "NaN" }
+        bodyMediaType: "application/cbor",
+        appliesTo: "client"
+    },
+    {
+        id: "RpcV2CborFloat16Subnormal",
+        documentation: "Ensures that clients can correctly parse a subnormal float16.",
+        protocol: rpcv2Cbor,
+        code: 200,
+        // https://cbor.nemo157.com/?type=hex&value=a16576616c7565f90050
+        body: "oWV2YWx1ZfkAUA==",
+        headers: {
+            "smithy-protocol": "rpc-v2-cbor",
+            "Content-Type": "application/cbor"
+        },
+        params: { value: 0.00000476837158203125 } // 1.25 * 2^-18
+        bodyMediaType: "application/cbor",
+        appliesTo: "client"
+    }
+])
+
+structure Float16Output {
+    value: Double
+}
diff --git a/smithy-protocol-tests/model/rpcv2Cbor/main.smithy b/smithy-protocol-tests/model/rpcv2Cbor/main.smithy
index 9d10e723e56..504491c8236 100644
--- a/smithy-protocol-tests/model/rpcv2Cbor/main.smithy
+++ b/smithy-protocol-tests/model/rpcv2Cbor/main.smithy
@@ -22,7 +22,8 @@ service RpcV2Protocol {
         GreetingWithErrors,
         FractionalSeconds,
         OperationWithDefaults,
-        SparseNullsOperation
+        SparseNullsOperation,
+        Float16
     ]
 }