diff --git a/.github/workflows/rust.yml b/.github/workflows/rust.yml
index f1c08fa8..71f3d153 100644
--- a/.github/workflows/rust.yml
+++ b/.github/workflows/rust.yml
@@ -26,7 +26,7 @@ jobs:
     runs-on: ${{ matrix.os }}
     strategy:
       matrix:
-        os: [ "macos-latest" ]
+        os: [ "macos-15" ]
         # Test on MSRV and stable.
         toolchain: [ "1.75.0", "stable" ]
     steps:
@@ -46,7 +46,7 @@ jobs:
     runs-on: ${{ matrix.os }}
     strategy:
       matrix:
-        os: [ "macos-latest" ]
+        os: [ "macos-15" ]
         # Test on the pinned rust-toolchain version.
         toolchain: [ "1.80.0" ]
     steps:
@@ -88,7 +88,7 @@ jobs:
     runs-on: ${{ matrix.os }}
     strategy:
       matrix:
-        os: [ "macos-latest" ]
+        os: [ "macos-15" ]
     steps:
       - uses: actions/checkout@v4
       - uses: dtolnay/rust-toolchain@master
@@ -110,7 +110,7 @@ jobs:
     runs-on: ${{ matrix.os }}
     strategy:
       matrix:
-        os: [ "macos-latest" ]
+        os: [ "macos-15" ]
     steps:
       - uses: actions/checkout@v4
       - uses: dtolnay/rust-toolchain@master