diff --git a/Tests/p4rseTests/ControlTests/Runtime.swift b/Tests/p4rseTests/ControlTests/Runtime.swift
index 22000cb..7fa1368 100644
--- a/Tests/p4rseTests/ControlTests/Runtime.swift
+++ b/Tests/p4rseTests/ControlTests/Runtime.swift
@@ -380,5 +380,78 @@ import TreeSitterP4
   // And that the proper action was invoked.
   let result_arg = try #UseOkResult(updated_execution.scopes.lookup(identifier: Identifier(name: "result_arg")))
   #expect(result_arg.eq(P4Value(P4IntValue(withValue: 7))))
-
 }
+
+@Test func test_control_key_from_struct() async throws {
+  let simple_parser_declaration = """
+    control simple(inout int result, bool x, int f) {
+      action a() {
+        result = 5;
+      }
+      action b() {
+        result = 7;
+      }
+      table t {
+        key = {
+          x: exact;
+          f: exact;
+        }
+        actions = {
+          a;
+          b;
+        }
+      }
+      apply {
+      }
+    };
+    """
+
+  let program = try! #UseOkResult(Program.Compile(simple_parser_declaration))
+
+  // Pull the control out of the compiled program.
+  let controls = program.InstancesWithTypes() { (tipe: P4QualifiedType) -> Bool in
+    switch tipe.baseType() {
+    case let c as Control: c.name == "simple"
+    default: false
+    }
+  }
+  var control = ((controls[0].baseType() as P4Type) as! Control)
+
+  // Add entries to the table.
+  control = control.updateTable(
+    addEntry: (
+      P4Value(P4BooleanValue(withValue: true)),
+      TypedIdentifier(name: "a", withType: P4QualifiedType(Action()))
+    )
+  ).updateTable(
+    addEntry: (
+      P4Value(P4IntValue(withValue: 5)),
+      TypedIdentifier(name: "b", withType: P4QualifiedType(Action()))
+    ))
+
+  // Set a variable in the global scope for the inout first parameter.
+  var global_values = VarValueScopes().enter()
+  global_values = global_values.declare(
+    identifier: Identifier(name: "result_arg"),
+    withValue: P4Value(
+          P4IntValue(withValue: 0),
+          P4QualifiedType(P4Int())))
+
+  let runtime = try #UseOkResult(
+    P4Runtime.Runtime<P4TableHitMissValue, Control>.create(control: control, withGlobalValues: global_values))
+
+  let (hit_miss, updated_execution) = try #UseOkResult(runtime.run(
+    withArguments: ArgumentList([
+      Argument(TypedIdentifier(name: "result_arg", withType: P4QualifiedType(P4Int())), atIndex: 0),
+      Argument(P4Value(P4BooleanValue(withValue: false)), atIndex: 1),
+      Argument(P4Value(P4IntValue(withValue: 5)), atIndex: 2),
+    ])))
+
+  // We expect there to be a hit.
+  #expect(hit_miss == P4TableHitMissValue.Hit)
+
+  // And that the proper action was invoked.
+  let result_arg = try #UseOkResult(updated_execution.scopes.lookup(identifier: Identifier(name: "result_arg")))
+  #expect(result_arg.eq(P4Value(P4IntValue(withValue: 7))))
+}
+