diff --git a/lib/delphi/test/TestClient.pas b/lib/delphi/test/TestClient.pas
index 08b3965..5f375ef 100644
--- a/lib/delphi/test/TestClient.pas
+++ b/lib/delphi/test/TestClient.pas
@@ -510,6 +510,11 @@
   client.testVoid();
   Expect( TRUE, 'testVoid()');  // success := no exception
 
+  s := BoolToString( client.testBool(TRUE));
+  Expect( s = BoolToString(TRUE),  'testBool(TRUE) = '+s);
+  s := BoolToString( client.testBool(FALSE));
+  Expect( s = BoolToString(FALSE),  'testBool(FALSE) = '+s);
+
   s := client.testString('Test');
   Expect( s = 'Test', 'testString(''Test'') = "'+s+'"');
 
diff --git a/lib/delphi/test/TestServer.pas b/lib/delphi/test/TestServer.pas
index 4f599ea..018282c 100644
--- a/lib/delphi/test/TestServer.pas
+++ b/lib/delphi/test/TestServer.pas
@@ -58,6 +58,7 @@
         FServer : IServer;
       protected
         procedure testVoid();
+        function testBool(thing: Boolean): Boolean;
         function testString(const thing: string): string;
         function testByte(thing: ShortInt): ShortInt;
         function testI32(thing: Integer): Integer;
@@ -394,6 +395,12 @@
   end;
 end;
 
+function TTestServer.TTestHandlerImpl.testBool(thing: Boolean): Boolean;
+begin
+  Console.WriteLine('testBool(' + BoolToStr(thing,true) + ')');
+  Result := thing;
+end;
+
 function TTestServer.TTestHandlerImpl.testString( const thing: string): string;
 begin
   Console.WriteLine('teststring("' + thing + '")');