--- guix-1.5.0/tests/channels.scm
+++ guix-1.5.0/tests/channels.scm
@@ -499,6 +499,9 @@
                     (list commit1)))))))
 
+;; This bootstrap disables channel authentication by default, so the missing
+;; introduction no longer raises the error this upstream test expects.
+(test-skip 1)
 (test-assert "latest-channel-instances, missing introduction for 'guix'"
   (with-temporary-git-repository directory
       '((add "a.txt" "A")
         (commit "first commit")
--- guix-1.5.0/tests/graph.scm
+++ guix-1.5.0/tests/graph.scm
@@ -186,6 +186,9 @@
                           implicit)))))))
 
+;; This bootstrap replaces Guix's historical bootstrap binaries with local
+;; seed packages, so the upstream %bootstrap-inputs graph assumption is false.
+(test-skip 1)
 (test-assert "bag DAG"                            ;a big town in Iraq
   (let-values (((backend nodes+edges) (make-recording-backend)))
     (let ((p (dummy-package "p")))
       (run-with-store %store