diff --git a/.github/workflows/master.yaml b/.github/workflows/main.yaml
similarity index 95%
rename from .github/workflows/master.yaml
rename to .github/workflows/main.yaml
index 034e379..d916436 100644
--- a/.github/workflows/master.yaml
+++ b/.github/workflows/main.yaml
@@ -1,8 +1,8 @@
-name: master
+name: main
 on:
   push:
     branches:
-      - master
+      - main
   schedule:
     - cron: '0 0 * * 0' # 00:00 Sunday
 
diff --git a/README.md b/README.md
index 6075cd6..c4607fb 100644
--- a/README.md
+++ b/README.md
@@ -3,7 +3,7 @@
 [![crate](https://img.shields.io/crates/v/num-complex.svg)](https://crates.io/crates/num-complex)
 [![documentation](https://docs.rs/num-complex/badge.svg)](https://docs.rs/num-complex)
 [![minimum rustc 1.60](https://img.shields.io/badge/rustc-1.60+-red.svg)](https://rust-lang.github.io/rfcs/2495-min-rust-version.html)
-[![build status](https://github.com/rust-num/num-complex/workflows/master/badge.svg)](https://github.com/rust-num/num-complex/actions)
+[![build status](https://github.com/rust-num/num-complex/actions/workflows/main.yaml/badge.svg)](https://github.com/rust-num/num-complex/actions/workflows/main.yaml)
 
 `Complex` numbers for Rust.
 
diff --git a/ci/test_full.sh b/ci/test_full.sh
index 23369ab..f35c37f 100755
--- a/ci/test_full.sh
+++ b/ci/test_full.sh
@@ -21,6 +21,14 @@ check_version() {
   ]]
 }
 
+export CARGO_RESOLVER_INCOMPATIBLE_RUST_VERSIONS=fallback
+generate_lockfile() {
+  cargo generate-lockfile
+  if ! check_version 1.85 ; then
+    cargo +stable update
+  fi
+}
+
 echo "Testing $CRATE on rustc $RUST_VERSION"
 if ! check_version $MSRV ; then
   echo "The minimum for $CRATE is rustc $MSRV"
@@ -30,8 +38,7 @@ fi
 FEATURES=(bytecheck bytemuck libm rand rkyv/size_64 serde)
 echo "Testing supported features: ${FEATURES[*]}"
 
-cargo generate-lockfile
-check_version 1.63.0 || cargo update -p libm --precise 0.2.9
+generate_lockfile
 
 set -x