diff --git a/testament/important_packages.nim b/testament/important_packages.nim
index 3d3c340eb..efee361da 100644
--- a/testament/important_packages.nim
+++ b/testament/important_packages.nim
@@ -82,7 +82,7 @@ pkg "karax", "nim c -r tests/tester.nim"
 pkg "kdtree", "nimble test -d:nimLegacyRandomInitRand", "https://github.com/jblindsay/kdtree"
 pkg "loopfusion"
 pkg "macroutils"
-pkg "manu"
+pkg "manu", allowFailure=true # pending https://github.com/planetis-m/manu/issues/5
 pkg "markdown"
 pkg "memo"
 pkg "msgpack4nim", "nim c -r tests/test_spec.nim"