diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index b399caf..cf49c4c 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -18,6 +18,21 @@ jobs:
       - uses: Swatinem/rust-cache@v2
       - run: scripts/check.sh
 
+  platforms:
+    strategy:
+      fail-fast: false
+      matrix:
+        os: [ubuntu-24.04, ubuntu-24.04-arm, windows-latest, windows-11-arm, macos-15-intel]
+    runs-on: ${{ matrix.os }}
+    steps:
+      - uses: actions/checkout@v7
+      - uses: dtolnay/rust-toolchain@master
+        with:
+          toolchain: "1.95"
+      - uses: Swatinem/rust-cache@v2
+      - run: cargo test --lib --features test-support --quiet
+      - run: cargo build --example gallery
+
   site:
     runs-on: ubuntu-latest
     defaults:
diff --git a/src/account/tests/billing.rs b/src/account/tests/billing.rs
index fc346a7..996fe95 100644
--- a/src/account/tests/billing.rs
+++ b/src/account/tests/billing.rs
@@ -269,7 +269,7 @@ fn a_card_waits_for_a_whole_code_and_a_name(cx: &mut TestAppContext) {
     tab(3, cx);
     write("3", cx);
     tab(4, cx);
-    tap("cmd-a", cx);
+    tap("secondary-a", cx);
     tap("backspace", cx);
     tap("enter", cx);
     assert!(said(&host, cx).is_empty(), "no name on the card");
diff --git a/src/chat/tests/mod.rs b/src/chat/tests/mod.rs
index d90ed5a..0db4141 100644
--- a/src/chat/tests/mod.rs
+++ b/src/chat/tests/mod.rs
@@ -142,7 +142,7 @@ fn an_edit_saves_only_a_change_and_escape_cancels(cx: &mut TestAppContext) {
         window.focus(&field, cx);
     });
     settle(cx);
-    cx.simulate_keystrokes("cmd-enter");
+    cx.simulate_keystrokes("secondary-enter");
     settle(cx);
     assert_eq!(
         edit.read_with(cx, |edit, _| edit.saved),
@@ -151,7 +151,7 @@ fn an_edit_saves_only_a_change_and_escape_cancels(cx: &mut TestAppContext) {
     );
     cx.simulate_input(" Gently.");
     settle(cx);
-    cx.simulate_keystrokes("cmd-enter");
+    cx.simulate_keystrokes("secondary-enter");
     settle(cx);
     assert_eq!(edit.read_with(cx, |edit, _| edit.saved), 1);
     cx.simulate_keystrokes("escape");
diff --git a/src/documents/blocks/tests.rs b/src/documents/blocks/tests.rs
index 156f6a5..c0584c0 100644
--- a/src/documents/blocks/tests.rs
+++ b/src/documents/blocks/tests.rs
@@ -96,7 +96,7 @@ fn backspace_at_the_start_joins_up_and_undo_parts_them(cx: &mut TestAppContext)
         blocks(&editor, cx),
         [text(BlockKind::Paragraph, "tone lift")]
     );
-    cx.simulate_keystrokes("cmd-z");
+    cx.simulate_keystrokes("secondary-z");
     settle(cx);
     assert_eq!(
         blocks(&editor, cx),
@@ -229,7 +229,7 @@ fn enter_over_a_selection_drops_it_and_splits_there(cx: &mut TestAppContext) {
             text(BlockKind::Paragraph, "ef")
         ]
     );
-    cx.simulate_keystrokes("cmd-z");
+    cx.simulate_keystrokes("secondary-z");
     settle(cx);
     assert_eq!(
         blocks(&editor, cx),
@@ -244,12 +244,12 @@ fn undo_puts_the_caret_back_where_the_change_began(cx: &mut TestAppContext) {
     caret(&editor, 0, 3, cx);
     cx.simulate_keystrokes("enter");
     settle(cx);
-    cx.simulate_keystrokes("cmd-z");
+    cx.simulate_keystrokes("secondary-z");
     settle(cx);
     let first = cx.update(|_, cx| editor.read(cx).blocks[0].key);
     let focused = cx.update(|window, cx| editor.read(cx).focused(window, cx));
     assert_eq!(focused, Some((first, 0)));
-    cx.simulate_keystrokes("cmd-shift-z");
+    cx.simulate_keystrokes("secondary-shift-z");
     settle(cx);
     assert_eq!(
         blocks(&editor, cx),
@@ -259,7 +259,7 @@ fn undo_puts_the_caret_back_where_the_change_began(cx: &mut TestAppContext) {
         ],
         "redo splits again"
     );
-    cx.simulate_keystrokes("cmd-z");
+    cx.simulate_keystrokes("secondary-z");
     settle(cx);
     cx.simulate_input("x");
     settle(cx);
@@ -305,7 +305,7 @@ fn undoing_a_kind_change_brings_back_its_styling(cx: &mut TestAppContext) {
     });
     settle(cx);
     caret(&editor, 0, 0, cx);
-    cx.simulate_keystrokes("cmd-z");
+    cx.simulate_keystrokes("secondary-z");
     settle(cx);
     let bold = cx.update(|_, cx| {
         let field = editor.read(cx).blocks[0].fields[0].clone();
@@ -329,7 +329,7 @@ fn undo_of_typing_restores_the_selection_it_replaced(cx: &mut TestAppContext) {
     cx.simulate_keystrokes("x");
     settle(cx);
     assert_eq!(blocks(&editor, cx), [text(BlockKind::Paragraph, "abxef")]);
-    cx.simulate_keystrokes("cmd-z");
+    cx.simulate_keystrokes("secondary-z");
     settle(cx);
     let selection = cx.update(|_, cx| editor.read(cx).blocks[0].fields[0].read(cx).selection());
     assert_eq!(blocks(&editor, cx), [text(BlockKind::Paragraph, "abcdef")]);
@@ -371,15 +371,15 @@ fn undo_of_a_delete_or_a_paste_restores_the_selection(cx: &mut TestAppContext) {
     cx.simulate_keystrokes("backspace");
     settle(cx);
     assert_eq!(blocks(&editor, cx), [text(BlockKind::Paragraph, "abef")]);
-    cx.simulate_keystrokes("cmd-z");
+    cx.simulate_keystrokes("secondary-z");
     settle(cx);
     assert_eq!(selection(cx), 2..4, "undo of a delete selects what it took");
     cx.update(|_, cx| cx.write_to_clipboard(gpui::ClipboardItem::new_string("xy".into())));
     select(&editor, 0, 0, 2..4, cx);
-    cx.simulate_keystrokes("cmd-v");
+    cx.simulate_keystrokes("secondary-v");
     settle(cx);
     assert_eq!(blocks(&editor, cx), [text(BlockKind::Paragraph, "abxyef")]);
-    cx.simulate_keystrokes("cmd-z");
+    cx.simulate_keystrokes("secondary-z");
     settle(cx);
     assert_eq!(
         selection(cx),
diff --git a/src/forms/tests/mod.rs b/src/forms/tests/mod.rs
index 491d873..44bbf45 100644
--- a/src/forms/tests/mod.rs
+++ b/src/forms/tests/mod.rs
@@ -121,7 +121,7 @@ fn a_composition_undoes_in_one_step(cx: &mut TestAppContext) {
         })
     });
     assert_eq!(text(field, cx), "你");
-    cx.simulate_keystrokes("cmd-z");
+    cx.simulate_keystrokes("secondary-z");
     assert_eq!(text(field, cx), "");
 }
 
@@ -142,7 +142,7 @@ fn a_committed_composition_obeys_the_filter_and_length(cx: &mut TestAppContext)
         })
     });
     assert_eq!(text(field, cx), "1");
-    cx.simulate_keystrokes("cmd-z");
+    cx.simulate_keystrokes("secondary-z");
     assert_eq!(text(field, cx), "");
 }
 
@@ -158,7 +158,7 @@ fn a_browser_paste_undoes_apart_from_the_typing(cx: &mut TestAppContext) {
         })
     });
     assert_eq!(text(field, cx), "abcd");
-    cx.simulate_keystrokes("cmd-z");
+    cx.simulate_keystrokes("secondary-z");
     assert_eq!(text(field, cx), "ab");
 }
 
@@ -169,7 +169,7 @@ fn undo_leaves_a_disabled_field_alone(cx: &mut TestAppContext) {
     focus(field, cx);
     cx.simulate_input("a");
     field.update(cx, |input, cx| input.set_disabled(true, cx));
-    cx.simulate_keystrokes("cmd-z");
+    cx.simulate_keystrokes("secondary-z");
     assert_eq!(text(field, cx), "a");
 }
 
@@ -194,7 +194,7 @@ fn stepping_starts_from_the_typed_number(cx: &mut TestAppContext) {
     setup(cx);
     let (view, cx) = cx.add_window_view(|_, _| Stepped { value: 4.0 });
     cx.update(|window, cx| window.focus_next(cx));
-    cx.simulate_keystrokes("cmd-a");
+    cx.simulate_keystrokes("secondary-a");
     cx.simulate_input("20");
     cx.simulate_keystrokes("up");
     assert_eq!(view.read_with(cx, |view, _| view.value), 21.0);
@@ -205,7 +205,7 @@ fn a_typed_number_reaches_the_owner_before_any_blur(cx: &mut TestAppContext) {
     setup(cx);
     let (view, cx) = cx.add_window_view(|_, _| Stepped { value: 100.0 });
     cx.update(|window, cx| window.focus_next(cx));
-    cx.simulate_keystrokes("cmd-a");
+    cx.simulate_keystrokes("secondary-a");
     cx.simulate_input("250");
     assert_eq!(
         view.read_with(cx, |view, _| view.value),
@@ -242,7 +242,7 @@ fn select_all_then_typing_replaces_the_pin(cx: &mut TestAppContext) {
     });
     cx.update(|window, cx| window.focus_next(cx));
     cx.simulate_input("4821");
-    cx.simulate_keystrokes("cmd-a");
+    cx.simulate_keystrokes("secondary-a");
     cx.simulate_input("1234");
     assert_eq!(view.read_with(cx, |view, _| view.code.clone()), "1234");
 }
@@ -277,7 +277,7 @@ fn select_all_then_typing_refits_a_masked_field(cx: &mut TestAppContext) {
     let (state, cx) = masked("1-999", cx);
     cx.simulate_input("123");
     assert_eq!(text(&state, cx), "1-123");
-    cx.simulate_keystrokes("cmd-a");
+    cx.simulate_keystrokes("secondary-a");
     cx.simulate_input("1");
     assert_eq!(text(&state, cx), "1-1");
 }
diff --git a/src/forms/tests/structure.rs b/src/forms/tests/structure.rs
index 5984d4d..22ec391 100644
--- a/src/forms/tests/structure.rs
+++ b/src/forms/tests/structure.rs
@@ -61,7 +61,7 @@ fn cmd_enter_in_a_field_submits_the_form_once(cx: &mut TestAppContext) {
     let (view, cx) = signup(cx);
     cx.update(|window, cx| window.focus_next(cx));
     cx.simulate_input("Ada");
-    cx.simulate_keystrokes("cmd-enter");
+    cx.simulate_keystrokes("secondary-enter");
     let counts = view.read_with(cx, |view, _| (view.sent, view.field_submits));
     assert_eq!(counts, (1, 0));
 }
@@ -73,7 +73,7 @@ fn cmd_enter_on_any_control_in_a_form_submits_it(cx: &mut TestAppContext) {
         window.focus_next(cx);
         window.focus_next(cx);
     });
-    cx.simulate_keystrokes("cmd-enter");
+    cx.simulate_keystrokes("secondary-enter");
     assert_eq!(
         view.read_with(cx, |view, _| view.sent),
         1,
diff --git a/src/misc/tests/numbers.rs b/src/misc/tests/numbers.rs
index 1317390..4a0e712 100644
--- a/src/misc/tests/numbers.rs
+++ b/src/misc/tests/numbers.rs
@@ -123,7 +123,7 @@ fn a_converter_reads_an_amount_in_another_unit(cx: &mut TestAppContext) {
     );
     press("tab", cx);
     press("tab", cx);
-    press("cmd-a", cx);
+    press("secondary-a", cx);
     cx.simulate_input("-40");
     assert!(shown("converted-−40 °F", cx));
     press("tab", cx);
@@ -134,7 +134,7 @@ fn a_converter_reads_an_amount_in_another_unit(cx: &mut TestAppContext) {
     assert!(shown("converted-233.15 K", cx), "picked Kelvin");
     press("shift-tab", cx);
     press("shift-tab", cx);
-    press("cmd-a", cx);
+    press("secondary-a", cx);
     cx.simulate_input("-");
     assert!(shown("converted-—", cx));
 }
diff --git a/src/settings/tests/theme.rs b/src/settings/tests/theme.rs
index 4de14e9..54f2b9f 100644
--- a/src/settings/tests/theme.rs
+++ b/src/settings/tests/theme.rs
@@ -55,16 +55,16 @@ fn colors(_: &mut Window, cx: &mut App, owner: Entity<Desk>) -> AnyElement {
         .into_any_element()
 }
 
-/// The first color is the eighth stop; Enter opens its picker, where the third stop is the hex field, which takes a new background.
+/// The first color is the eighth stop; Enter opens its picker, where the hex field follows the eyedropper, a stop on macOS alone, and takes a new background.
 #[gpui::test]
 fn a_color_well_sets_its_own_color(cx: &mut TestAppContext) {
     let (host, cx) = desk(colors, cx);
     tab(8, cx);
     tap("enter", cx);
-    for _ in 0..3 {
+    for _ in 0..if cfg!(target_os = "macos") { 3 } else { 2 } {
         tap("tab", cx);
     }
-    tap("cmd-a", cx);
+    tap("secondary-a", cx);
     cx.simulate_input("#224466");
     tap("enter", cx);
     assert_eq!(said(&host, cx), ["#224466"]);
diff --git a/src/tables/tests/clipboard.rs b/src/tables/tests/clipboard.rs
index 5d43a22..4505c00 100644
--- a/src/tables/tests/clipboard.rs
+++ b/src/tables/tests/clipboard.rs
@@ -18,7 +18,7 @@ fn a_paste_fills_cells_from_the_cursor(cx: &mut TestAppContext) {
     cx.simulate_click(point(px(48.0), px(42.0)), Modifiers::none());
     settle(cx);
     cx.update(|_, cx| cx.write_to_clipboard(ClipboardItem::new_string("x\ty\nz\tw".into())));
-    cx.simulate_keystrokes("cmd-v");
+    cx.simulate_keystrokes("secondary-v");
     settle(cx);
     let cells = |row, col, text: &str| (row, col, text.to_string());
     assert_eq!(
diff --git a/src/tables/tests/mod.rs b/src/tables/tests/mod.rs
index 7a76a4e..7793f78 100644
--- a/src/tables/tests/mod.rs
+++ b/src/tables/tests/mod.rs
@@ -376,7 +376,7 @@ fn a_grid_that_shrinks_keeps_its_cursor_inside(cx: &mut TestAppContext) {
     count.set(1);
     view.update(cx, |_, cx| cx.notify());
     settle(cx);
-    cx.simulate_keystrokes("cmd-c");
+    cx.simulate_keystrokes("secondary-c");
     settle(cx);
     let copied = cx.update(|_, cx| cx.read_from_clipboard().and_then(|item| item.text()));
     assert_eq!(