diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index d516aaaf3..b81be7b05 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -172,6 +172,41 @@ jobs:
           cd macos
           xcodebuild -target Ghostty-iOS "CODE_SIGNING_ALLOWED=NO"
 
+  build-macos-matrix:
+    strategy:
+      fail-fast: false
+      matrix:
+        renderer: [opengl, metal]
+
+        font_backend:
+          [
+            freetype,
+            coretext,
+            coretext_freetype,
+            coretext_harfbuzz,
+            coretext_noshape,
+          ]
+    runs-on: namespace-profile-ghostty-macos
+    needs: test
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+
+      # Install Nix and use that to run our tests so our environment matches exactly.
+      - uses: cachix/install-nix-action@v26
+        with:
+          nix_path: nixpkgs=channel:nixos-unstable
+      - uses: cachix/cachix-action@v14
+        with:
+          name: ghostty
+          authToken: "${{ secrets.CACHIX_AUTH_TOKEN }}"
+
+      - name: Test
+        run: nix develop -c zig build test -Dapp-runtime=glfw -Drenderer=${{ matrix.renderer }} -Dfont-backend=${{ matrix.font_backend }}
+
+      - name: Build
+        run: nix develop -c zig build -Dapp-runtime=glfw -Drenderer=${{ matrix.renderer }} -Dfont-backend=${{ matrix.font_backend }}
+
   build-windows:
     runs-on: windows-2019
     # this will not stop other jobs from running
diff --git a/src/font/CodepointResolver.zig b/src/font/CodepointResolver.zig
index a0073f9ad..543378c4f 100644
--- a/src/font/CodepointResolver.zig
+++ b/src/font/CodepointResolver.zig
@@ -380,32 +380,35 @@ test getIndex {
     var c = try Collection.init(alloc);
     c.load_options = .{ .library = lib };
 
-    _ = try c.add(alloc, .regular, .{ .loaded = try Face.init(
-        lib,
-        testFont,
-        .{ .size = .{ .points = 12, .xdpi = 96, .ydpi = 96 } },
-    ) });
-    if (font.options.backend != .coretext) {
-        // Coretext doesn't support Noto's format
+    {
+        errdefer c.deinit(alloc);
+        _ = try c.add(alloc, .regular, .{ .loaded = try Face.init(
+            lib,
+            testFont,
+            .{ .size = .{ .points = 12, .xdpi = 96, .ydpi = 96 } },
+        ) });
+        if (comptime !font.options.backend.hasCoretext()) {
+            // Coretext doesn't support Noto's format
+            _ = try c.add(
+                alloc,
+                .regular,
+                .{ .loaded = try Face.init(
+                    lib,
+                    testEmoji,
+                    .{ .size = .{ .points = 12 } },
+                ) },
+            );
+        }
         _ = try c.add(
             alloc,
             .regular,
             .{ .loaded = try Face.init(
                 lib,
-                testEmoji,
+                testEmojiText,
                 .{ .size = .{ .points = 12 } },
             ) },
         );
     }
-    _ = try c.add(
-        alloc,
-        .regular,
-        .{ .loaded = try Face.init(
-            lib,
-            testEmojiText,
-            .{ .size = .{ .points = 12 } },
-        ) },
-    );
 
     var r: CodepointResolver = .{ .collection = c };
     defer r.deinit(alloc);
@@ -429,7 +432,7 @@ test getIndex {
     {
         const idx = r.getIndex(alloc, 0x270C, .regular, .text).?;
         try testing.expectEqual(Style.regular, idx.style);
-        const text_idx = if (font.options.backend == .coretext) 1 else 2;
+        const text_idx = if (comptime font.options.backend.hasCoretext()) 1 else 2;
         try testing.expectEqual(@as(Collection.Index.IndexInt, text_idx), idx.idx);
     }
     {
diff --git a/src/font/SharedGridSet.zig b/src/font/SharedGridSet.zig
index add1e8339..daf39b54f 100644
--- a/src/font/SharedGridSet.zig
+++ b/src/font/SharedGridSet.zig
@@ -233,7 +233,7 @@ fn collection(
     // people add other emoji fonts to their system, we always want to
     // prefer the official one. Users can override this by explicitly
     // specifying a font-family for emoji.
-    if (comptime builtin.target.isDarwin()) apple_emoji: {
+    if (comptime builtin.target.isDarwin() and Discover != void) apple_emoji: {
         const disco = try self.discover() orelse break :apple_emoji;
         var disco_it = try disco.discover(self.alloc, .{
             .family = "Apple Color Emoji",
diff --git a/src/font/shaper/harfbuzz.zig b/src/font/shaper/harfbuzz.zig
index c34a57627..11adecb76 100644
--- a/src/font/shaper/harfbuzz.zig
+++ b/src/font/shaper/harfbuzz.zig
@@ -1213,7 +1213,7 @@ fn testShaperWithFont(alloc: Allocator, font_req: TestFont) !TestShaper {
         .{ .size = .{ .points = 12 } },
     ) });
 
-    if (font.options.backend != .coretext) {
+    if (comptime !font.options.backend.hasCoretext()) {
         // Coretext doesn't support Noto's format
         _ = try c.add(alloc, .regular, .{ .loaded = try Face.init(
             lib,