diff --git a/tests/generator_scripts/source/ComposerHeaderOnly.harness.cpp b/tests/generator_scripts/source/ComposerHeaderOnly.harness.cpp
index f6c549a3a33d434fd0bb8865140f1edf29ed9983..76f2de4c99da5bb7bb968a404f4c43b4dcfb7482 100644
--- a/tests/generator_scripts/source/ComposerHeaderOnly.harness.cpp
+++ b/tests/generator_scripts/source/ComposerHeaderOnly.harness.cpp
@@ -8,11 +8,23 @@
 int main(void) {
     assert( twice(13) == 26 );
 
-    std::vector< int64_t > arr { 1, 2, 3, 4, 5, 6 };
-    twiceKernel(arr);
+    {
+        std::vector< int64_t > arr { 1, 2, 3, 4, 5, 6 };
+        twiceKernel(arr);
 
-    std::vector< int64_t > expected { 2, 4, 6, 8, 10, 12 };
-    assert ( arr == expected );
+        std::vector< int64_t > expected { 2, 4, 6, 8, 10, 12 };
+        assert ( arr == expected );
+    }
+    
+    {
+        std::vector< int64_t > arr { 1, 2, 3, 4, 5, 6 };
+        ScaleKernel ker { 3 };
+
+        ker( arr );
+
+        std::vector< int64_t > expected { 3, 6, 9, 12, 15, 18 };
+        assert ( arr == expected );
+    }
 
     return 0;
 }
diff --git a/tests/generator_scripts/source/ComposerHeaderOnly.py b/tests/generator_scripts/source/ComposerHeaderOnly.py
index 0bd1a07879855b9a2af75e493fa84e92632a70ff..3881457634e8e5182ce0922700e7ad1541199cca 100644
--- a/tests/generator_scripts/source/ComposerHeaderOnly.py
+++ b/tests/generator_scripts/source/ComposerHeaderOnly.py
@@ -17,10 +17,29 @@ with SourceFileGenerator(cfg) as sfg:
     arr = ps.fields("arr: int64[1D]")
     vec = std.vector.from_field(arr)
 
-    asm = ps.Assignment(arr(0), 2 * arr(0))
+    c = ps.TypedSymbol("c", "int64")
+
+    asm = ps.Assignment(arr(0), c * arr(0))
     khandle = sfg.kernels.create(asm)
 
     sfg.function("twiceKernel")(
         sfg.map_field(arr, vec),
+        sfg.set_param(c, "2"),
         sfg.call(khandle)
     )
+
+    #   Inline class members
+
+    sfg.klass("ScaleKernel")(
+        sfg.private(
+            c
+        ),
+        sfg.public(
+            sfg.constructor(c).init(c)(c),
+            sfg.method("operator()")(
+                sfg.map_field(arr, vec),
+                sfg.set_param(c, "this->c"),
+                sfg.call(khandle)
+            )
+        )
+    )