diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 69b94a48..a9b872cf 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -52,6 +52,11 @@ jobs:
           # For some reason this is required to run the fuzzer on OSX
           rustup target add x86_64-apple-darwin
 
+      - name: Setup wasmtime
+        uses: bytecodealliance/actions/wasmtime/setup@v1
+        with:
+            version: "24.0.0"
+
       - name: Install cargo-deny
         if: steps.rust-cache.outputs.cache-hit != 'true'
         run: rustup run --install 1.74 cargo install --force --version 0.14.17 cargo-deny --locked
@@ -60,6 +65,10 @@ jobs:
         if: steps.rust-cache.outputs.cache-hit != 'true'
         run: cargo install --force --version 0.11.0 cargo-fuzz --locked
 
+      - name: Install cargo-wasi
+        if: steps.rust-cache.outputs.cache-hit != 'true'
+        run: cargo install --force --version 0.1.28 cargo-wasi --locked
+
       - name: Install just
         if: steps.rust-cache.outputs.cache-hit != 'true'
         run: cargo install --force --version 1.8.0 just --locked
@@ -98,12 +107,9 @@ jobs:
           pip3 install maturin
           just test_py
 
-# Re-enable when this works on stable
-#      - name: Run WASI tests
-#        if: startsWith(matrix.os, 'macos')
-#        run: |
-#          rustup toolchain install nightly
-#          rustup target add wasm32-wasi
-#          brew install wasmtime
-#          cargo install --force --version 0.1.27 cargo-wasi --locked
-#          just test_wasi
+      - name: Run WASI tests
+        if: runner.os != 'Windows'
+        run: |
+          rustup toolchain install nightly
+          rustup target add wasm32-wasi
+          just test_wasi
diff --git a/justfile b/justfile
index cf5e6f8b..e2eb7302 100644
--- a/justfile
+++ b/justfile
@@ -27,8 +27,8 @@ install_py: pre
 test: pre
     RUST_BACKTRACE=1 cargo test
 
-test_wasi: pre
-    CARGO_TARGET_WASM32_WASI_RUNNER="wasmtime --mapdir=/::$TMPDIR" cargo +nightly wasi test -- --nocapture
+test_wasi:
+    RUSTFLAGS="-Z wasi-exec-model=reactor" cargo +nightly wasi test -- --nocapture
 
 bench bench='lmdb_benchmark': pre
     cargo bench --bench {{bench}}