diff --git a/.github/workflows/audit.yml b/.github/workflows/audit.yml
index 1a2dc1b76..2b7720c45 100644
--- a/.github/workflows/audit.yml
+++ b/.github/workflows/audit.yml
@@ -24,6 +24,18 @@ jobs:
     steps:
       - uses: actions/checkout@v4
 
-      - name: cargo audit
-        run: |
-          cargo audit
+      - uses: dtolnay/rust-toolchain@stable
+        id: rust-toolchain
+
+      - uses: actions/cache@v4
+        with:
+          path: |
+            ~/.cargo/bin/
+            ~/.cargo/registry/index/
+            ~/.cargo/registry/cache/
+            ~/.cargo/git/db/
+          key: ${{ runner.os }}-${{ steps.rust-toolchain.outputs.cachekey }}-audit
+
+      - uses: rustsec/audit-check@v1.4.1
+        with:
+          token: ${{ secrets.GITHUB_TOKEN }}
diff --git a/.github/workflows/check.yml b/.github/workflows/check.yml
index 99ef7d09f..f07cbf279 100644
--- a/.github/workflows/check.yml
+++ b/.github/workflows/check.yml
@@ -35,6 +35,7 @@ jobs:
       - uses: ./.github/actions/rm
 
       - uses: dtolnay/rust-toolchain@stable
+        id: rust-toolchain
         with:
           components: clippy,rustfmt
 
@@ -46,7 +47,7 @@ jobs:
             ~/.cargo/registry/cache/
             ~/.cargo/git/db/
             target/
-          key: ${{ runner.os }}-cargo-${{ hashFiles('**/Cargo.toml') }}
+          key: ${{ runner.os }}-${{ steps.rust-toolchain.outputs.cachekey }}-cargo-${{ hashFiles('**/Cargo.toml') }}
 
       - name: Check formatting
         run: cargo fmt --all -- --check --config "imports_granularity=Crate,group_imports=StdExternalCrate"
@@ -86,6 +87,7 @@ jobs:
       - uses: ./.github/actions/rm
 
       - uses: dtolnay/rust-toolchain@stable
+        id: rust-toolchain
         with:
           components: clippy,rustfmt
 
@@ -97,7 +99,7 @@ jobs:
             ~/.cargo/registry/cache/
             ~/.cargo/git/db/
             target/
-          key: ${{ runner.os }}-cargo-${{ hashFiles('**/Cargo.toml') }}
+          key: ${{ runner.os }}-${{ steps.rust-toolchain.outputs.cachekey }}-cargo-${{ hashFiles('**/Cargo.toml') }}
 
       - name: Release Build
         run: cargo build --release
@@ -120,6 +122,7 @@ jobs:
       - uses: ./.github/actions/rm
 
       - uses: dtolnay/rust-toolchain@stable
+        id: rust-toolchain
         with:
           components: clippy,rustfmt
 
@@ -131,7 +134,7 @@ jobs:
             ~/.cargo/registry/cache/
             ~/.cargo/git/db/
             target/
-          key: ${{ runner.os }}-cargo-${{ hashFiles('**/Cargo.toml') }}
+          key: ${{ runner.os }}-${{ steps.rust-toolchain.outputs.cachekey }}-cargo-${{ hashFiles('**/Cargo.toml') }}
 
       - name: Build benchmarks
         run: cargo build --benches --no-default-features --features "enable-benches compact-gate"
@@ -162,6 +165,7 @@ jobs:
       - uses: actions/checkout@v4
       - uses: ./.github/actions/rm
       - uses: dtolnay/rust-toolchain@stable
+        id: rust-toolchain
       - uses: actions/cache@v4
         with:
           path: |
@@ -170,7 +174,7 @@ jobs:
             ~/.cargo/registry/cache/
             ~/.cargo/git/db/
             target/
-          key: ${{ runner.os }}-cargo-${{ hashFiles('**/Cargo.toml') }}
+          key: ${{ runner.os }}-${{ steps.rust-toolchain.outputs.cachekey }}-cargo-${{ hashFiles('**/Cargo.toml') }}
 
       - name: Slow Unit Tests
         run: cargo test -p ipa-core --lib -- mpc_proptest semi_honest_with_dp_slow gen_binomial_noise_16_breakdowns
@@ -187,9 +191,10 @@ jobs:
       - name: Integration Tests - IPA with Relaxed DP
         run: cargo test --release --test "ipa_with_relaxed_dp" --no-default-features --features "cli web-app real-world-infra test-fixture compact-gate relaxed-dp"
 
-  # sanitizers currently require nightly https://github.com/rust-lang/rust/issues/39699
+  # sanitizers currently require nightly https://github.com/rust-lang/rust/issues/39699,
+  # and are broken on ubuntu 24.04 https://github.com/rust-lang/rust/issues/111073#issuecomment-2561607617
   sanitize:
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-22.04
     strategy:
       fail-fast: false
       matrix:
diff --git a/ipa-core/src/protocol/hybrid/breakdown_reveal.rs b/ipa-core/src/protocol/hybrid/breakdown_reveal.rs
index 59082af96..8c1215f63 100644
--- a/ipa-core/src/protocol/hybrid/breakdown_reveal.rs
+++ b/ipa-core/src/protocol/hybrid/breakdown_reveal.rs
@@ -626,7 +626,7 @@ mod proptests {
                 } = input_struct;
                 let config = TestWorldConfig {
                     seed,
-                    timeout: Some(Duration::from_secs(30)),
+                    timeout: Some(Duration::from_secs(60)),
                     ..Default::default()
                 };
                 let result = TestWorld::<WithShards<PROP_SHARDS>>::with_config(&config)