diff --git a/src/Makefile_Ecore.am b/src/Makefile_Ecore.am
index 38aeab1f6c..364bac41d6 100644
--- a/src/Makefile_Ecore.am
+++ b/src/Makefile_Ecore.am
@@ -5,7 +5,8 @@ ecore_eolian_files_legacy = \
 	lib/ecore/ecore_exe.eo \
 	lib/ecore/ecore_event_message.eo \
 	lib/ecore/ecore_event_message_handler.eo \
-	lib/ecore/efl_loop_timer.eo
+	lib/ecore/efl_loop_timer.eo \
+	tests/ecore/ecore_audio_out_test.eo
 
 ecore_eolian_files_public = \
 	lib/ecore/efl_app.eo \
diff --git a/src/lib/ecore_audio/ecore_audio_out.eo b/src/lib/ecore_audio/ecore_audio_out.eo
index 72d65d142c..d50f1c1473 100644
--- a/src/lib/ecore_audio/ecore_audio_out.eo
+++ b/src/lib/ecore_audio/ecore_audio_out.eo
@@ -1,4 +1,4 @@
-class Ecore.Audio.Out extends Ecore.Audio
+abstract Ecore.Audio.Out extends Ecore.Audio
 {
    [[Ecore Audio output object.]]
 
diff --git a/src/lib/ecore_audio/ecore_audio_out_pulse.eo b/src/lib/ecore_audio/ecore_audio_out_pulse.eo
index 6d28e7edbf..ea3940acae 100644
--- a/src/lib/ecore_audio/ecore_audio_out_pulse.eo
+++ b/src/lib/ecore_audio/ecore_audio_out_pulse.eo
@@ -7,6 +7,8 @@ class Ecore.Audio.Out.Pulse extends Ecore.Audio.Out
       Efl.Object.constructor;
       Efl.Object.destructor;
       Ecore.Audio.volume { set; }
+      @empty Ecore.Audio.format { set; get; }
+      @empty Ecore.Audio.source { set; get; }
       Ecore.Audio.Out.input_attach;
       Ecore.Audio.Out.input_detach;
    }
diff --git a/src/lib/ecore_audio/ecore_audio_out_wasapi.eo b/src/lib/ecore_audio/ecore_audio_out_wasapi.eo
index 00c503dd7c..c32e9ecef8 100644
--- a/src/lib/ecore_audio/ecore_audio_out_wasapi.eo
+++ b/src/lib/ecore_audio/ecore_audio_out_wasapi.eo
@@ -7,6 +7,8 @@ class Ecore.Audio.Out.Wasapi extends Ecore.Audio.Out
       Efl.Object.constructor;
       Efl.Object.destructor;
       Ecore.Audio.volume { set;}
+      @empty Ecore.Audio.format { set; get; }
+      @empty Ecore.Audio.source { set; get; }
       Ecore.Audio.Out.input_attach;
       Ecore.Audio.Out.input_detach;
    }
diff --git a/src/tests/ecore/ecore_audio_out_test.eo b/src/tests/ecore/ecore_audio_out_test.eo
new file mode 100644
index 0000000000..a5ec9218d7
--- /dev/null
+++ b/src/tests/ecore/ecore_audio_out_test.eo
@@ -0,0 +1,8 @@
+class Ecore.Audio.Out.Test extends Ecore.Audio.Out
+{
+   data: null;
+   implements {
+      @empty Ecore.Audio.source { set; get; }
+      @empty Ecore.Audio.format { set; get; }
+   }
+}
diff --git a/src/tests/ecore/ecore_test_ecore_audio.c b/src/tests/ecore/ecore_test_ecore_audio.c
index c90d575eea..9c8a890945 100644
--- a/src/tests/ecore/ecore_test_ecore_audio.c
+++ b/src/tests/ecore/ecore_test_ecore_audio.c
@@ -311,6 +311,9 @@ EFL_START_TEST(ecore_test_ecore_audio_obj_sndfile)
 }
 EFL_END_TEST
 
+#include "ecore_audio_out_test.eo.h"
+#include "ecore_audio_out_test.eo.c"
+
 EFL_START_TEST(ecore_test_ecore_audio_obj_in_out)
 {
   Eo *out2;
@@ -319,7 +322,7 @@ EFL_START_TEST(ecore_test_ecore_audio_obj_in_out)
 
   Eo *in = efl_add_ref(ECORE_AUDIO_IN_CLASS, NULL);
   Eo *in2 = efl_add_ref(ECORE_AUDIO_IN_CLASS, NULL);
-  Eo *out = efl_add_ref(ECORE_AUDIO_OUT_CLASS, NULL);
+  Eo *out = efl_add_ref(ECORE_AUDIO_OUT_TEST_CLASS, NULL);
 
   fail_if(!in);
   fail_if(!in2);
@@ -418,7 +421,7 @@ EFL_START_TEST(ecore_test_ecore_audio_obj_vio)
   in = efl_add_ref(ECORE_AUDIO_IN_CLASS, NULL);
   fail_if(!in);
 
-  out = efl_add_ref(ECORE_AUDIO_OUT_CLASS, NULL);
+  out = efl_add_ref(ECORE_AUDIO_OUT_TEST_CLASS, NULL);
   fail_if(!out);
 
   ecore_audio_obj_vio_set(in, &in_vio, NULL, NULL);
@@ -543,7 +546,7 @@ EFL_START_TEST(ecore_test_ecore_audio_obj)
   objs[0] = efl_add_ref(ECORE_AUDIO_IN_CLASS, NULL);
   fail_if(!objs[0]);
 
-  objs[1] = efl_add_ref(ECORE_AUDIO_OUT_CLASS, NULL);
+  objs[1] = efl_add_ref(ECORE_AUDIO_OUT_TEST_CLASS, NULL);
   fail_if(!objs[1]);
 
   for (i=0; i<2; i++) {
diff --git a/src/tests/ecore/meson.build b/src/tests/ecore/meson.build
index 98104146be..4b46814bbe 100644
--- a/src/tests/ecore/meson.build
+++ b/src/tests/ecore/meson.build
@@ -23,9 +23,28 @@ ecore_suite_deps += ecore_evas
 ecore_suite_deps += ecore_input
 ecore_suite_deps += ecore_imf
 
+test_eo_files = [
+  'ecore_audio_out_test.eo',
+]
+test_eo_file_target = []
+
+foreach eo_file : test_eo_files
+    test_eo_file_target += custom_target('eolian_gen_' + eo_file,
+    input : eo_file,
+    output : [eo_file + '.h'],
+    depfile : eo_file + '.d',
+    install : false,
+    command : eolian_gen + [ '-I', meson.current_source_dir(), eolian_include_directories,
+                           '-o', 'h:' + join_paths(meson.current_build_dir(), eo_file + '.h'),
+                           '-o', 'c:' + join_paths(meson.current_build_dir(), eo_file + '.c'),
+                           '-o', 'd:' + join_paths(meson.current_build_dir(), eo_file + '.d'),
+                           '-gchd', '@INPUT@'])
+endforeach
+
 if get_option('audio')
   ecore_suite_deps += ecore_audio
   ecore_suite_src += 'ecore_test_ecore_audio.c'
+  ecore_suite_src += test_eo_file_target
 endif
 
 if get_option('fb')