diff --git a/.github/workflows/rust.yml b/.github/workflows/rust.yml
index 05a30b63..4b828d85 100644
--- a/.github/workflows/rust.yml
+++ b/.github/workflows/rust.yml
@@ -58,11 +58,18 @@ jobs:
         # macos-14 for M1 runners
         os: [ubuntu-22.04, windows-2022, macos-14]
         features: [all, default]
+        rust-version:
+          - stable
+          # 1.85 is the MSRV
+          - "1.85"
         include:
           - features: all
             feature_flags: --all-features
     steps:
       - uses: actions/checkout@0c366fd6a839edf440554fa01a7085ccba70ac98
+      - uses: dtolnay/rust-toolchain@v1
+        with:
+          toolchain: ${{ matrix.rust-version }}
       - name: Report cargo version
         run: cargo --version
       - name: Report rustc version
@@ -75,4 +82,7 @@ jobs:
       - name: Build
         run: cargo build ${{ matrix.feature_flags }} --locked --all-targets --verbose
       - name: Run tests
-        run: cargo test ${{ matrix.feature_flags }} --locked --all-targets --verbose
+        run: cargo test ${{ matrix.feature_flags }} --locked --all-targets --verbose -- --exact --skip fail
+      - name: Run trybuild tests
+        run: cargo test ${{ matrix.feature_flags }} --locked --all-targets --verbose -- --exact fail
+
diff --git a/Cargo.toml b/Cargo.toml
index 60eb568b..8643fa5e 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -9,6 +9,10 @@ default-members = ["dropshot", "dropshot_endpoint" ]
 
 resolver = "2"
 
+[workspace.package]
+edition = "2024"
+rust-version = "1.85"
+
 [workspace.lints.clippy]
 # Clippy's style nits are useful, but not worth keeping in CI.
 style = { level = "allow", priority = -1 }
diff --git a/dropshot/Cargo.toml b/dropshot/Cargo.toml
index 97ff1d85..15576849 100644
--- a/dropshot/Cargo.toml
+++ b/dropshot/Cargo.toml
@@ -3,7 +3,8 @@ name = "dropshot"
 description = "expose REST APIs from a Rust program"
 version = "0.17.0"
 authors = ["David Pacheco <dap@oxidecomputer.com>"]
-edition = "2021"
+edition.workspace = true
+rust-version.workspace = true
 license = "Apache-2.0"
 repository = "https://github.com/oxidecomputer/dropshot/"
 readme = "README-crates.io.md"
diff --git a/dropshot_endpoint/Cargo.toml b/dropshot_endpoint/Cargo.toml
index b73c5ab4..a475153b 100644
--- a/dropshot_endpoint/Cargo.toml
+++ b/dropshot_endpoint/Cargo.toml
@@ -3,7 +3,8 @@ name = "dropshot_endpoint"
 description = "macro used by dropshot consumers for registering handlers"
 version = "0.17.0"
 authors = ["Adam H. Leventhal <ahl@oxide.computer>"]
-edition = "2021"
+edition.workspace = true
+rust-version.workspace = true
 license = "Apache-2.0"
 repository = "https://github.com/oxidecomputer/dropshot/"
 
diff --git a/rustfmt.toml b/rustfmt.toml
index 8a0aff38..59816574 100644
--- a/rustfmt.toml
+++ b/rustfmt.toml
@@ -4,4 +4,3 @@
 max_width = 80
 use_small_heuristics = "max"
 edition = "2024"
-style_edition = "2024"