diff --git a/.cci.jenkinsfile b/.cci.jenkinsfile
index 12d9988a..213d23c9 100644
--- a/.cci.jenkinsfile
+++ b/.cci.jenkinsfile
@@ -1,4 +1,4 @@
-// Documentation: https://github.com/coreos/coreos-ci/blob/master/README-upstream-ci.md
+// Documentation: https://github.com/coreos/coreos-ci/blob/main/README-upstream-ci.md
 
 stage("Build") {
 parallel normal: {
diff --git a/tests/inst/src/destructive.rs b/tests/inst/src/destructive.rs
index d631b9a7..5f4fb790 100644
--- a/tests/inst/src/destructive.rs
+++ b/tests/inst/src/destructive.rs
@@ -1,7 +1,7 @@
 //! Test that interrupting an upgrade is safe.
 //!
 //! This test builds on coreos-assembler's "external tests":
-//! https://github.com/coreos/coreos-assembler/blob/master/mantle/kola/README-kola-ext.md
+//! https://github.com/coreos/coreos-assembler/blob/main/mantle/kola/README-kola-ext.md
 //! Key to this in particular is coreos-assembler implementing the Debian autopkgtest reboot API.
 //!
 //! The basic model of this test is: