diff --git a/testsuite/scripts/test_run_proto_gha.scd b/testsuite/scripts/test_run_proto_gha.scd
index cd87287fa4c..7b3fc0b14fc 100644
--- a/testsuite/scripts/test_run_proto_gha.scd
+++ b/testsuite/scripts/test_run_proto_gha.scd
@@ -123,4 +123,10 @@
 		'skip': "true",
 		'skipReason': "Requires ALSA kernel module, not allowed in GHA",
 	),
+	(
+		'suite': "TestUGen_RTAlloc",
+		'test': "test_allUGens",
+		'skip': "true",
+		'skipReason': "RT memory allocation seems to be unreliable - see GH issue #6410",
+	),
 ]