diff --git a/Cargo.toml b/Cargo.toml
index 95c956d5..90297f29 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -103,11 +103,15 @@ todo = "deny"
 unimplemented = "deny"
 unreachable = "deny"
 
-[profile.dev.package."*"]
-opt-level = 2
-
+# Workspace crates keep file:line in panic backtraces; dependencies carry no debug info. Both make
+# the test build faster and the target dir smaller.
 [profile.dev]
 opt-level = 1
+debug = "line-tables-only"
+
+[profile.dev.package."*"]
+opt-level = 2
+debug = false
 
 [profile.release]
 lto = "thin"
diff --git a/apps/figcraft-cli/tests/cli.rs b/apps/figcraft-cli/tests/it/cli.rs
similarity index 99%
rename from apps/figcraft-cli/tests/cli.rs
rename to apps/figcraft-cli/tests/it/cli.rs
index eb42b8d8..4af73d69 100644
--- a/apps/figcraft-cli/tests/cli.rs
+++ b/apps/figcraft-cli/tests/it/cli.rs
@@ -1,5 +1,4 @@
 //! The binary end to end.
-#![allow(clippy::unwrap_used, clippy::expect_used, clippy::panic)]
 
 use std::io::Write;
 use std::process::{Command, Stdio};
diff --git a/apps/figcraft-cli/tests/export_depth.rs b/apps/figcraft-cli/tests/it/export_depth.rs
similarity index 97%
rename from apps/figcraft-cli/tests/export_depth.rs
rename to apps/figcraft-cli/tests/it/export_depth.rs
index d8b3ef36..37350c1e 100644
--- a/apps/figcraft-cli/tests/export_depth.rs
+++ b/apps/figcraft-cli/tests/it/export_depth.rs
@@ -1,5 +1,4 @@
 //! Depth refusal through the actual CLI, including its exit status and destination writes.
-#![allow(clippy::unwrap_used, clippy::expect_used, clippy::panic)]
 
 use figcraft_doc::color::{Color, Paint};
 use figcraft_doc::{Document, NodeKind};
diff --git a/apps/figcraft-cli/tests/fonts.rs b/apps/figcraft-cli/tests/it/fonts.rs
similarity index 98%
rename from apps/figcraft-cli/tests/fonts.rs
rename to apps/figcraft-cli/tests/it/fonts.rs
index ef5c638f..a48056bd 100644
--- a/apps/figcraft-cli/tests/fonts.rs
+++ b/apps/figcraft-cli/tests/it/fonts.rs
@@ -1,6 +1,5 @@
 //! Headless runs lay text out with the installed fonts, like the desktop app, unless
 //! `--no-system-fonts` or `FIGCRAFT_NO_SYSTEM_FONTS=1` opts out.
-#![allow(clippy::unwrap_used, clippy::expect_used, clippy::panic)]
 
 use std::process::Command;
 
diff --git a/apps/figcraft-cli/tests/it/main.rs b/apps/figcraft-cli/tests/it/main.rs
new file mode 100644
index 00000000..ae4b0488
--- /dev/null
+++ b/apps/figcraft-cli/tests/it/main.rs
@@ -0,0 +1,12 @@
+//! The crate's integration tests, built as one test binary.
+
+#[allow(clippy::unwrap_used, clippy::expect_used, clippy::panic)]
+mod cli;
+#[allow(clippy::unwrap_used, clippy::expect_used, clippy::panic)]
+mod export_depth;
+#[allow(clippy::unwrap_used, clippy::expect_used, clippy::panic)]
+mod fonts;
+#[allow(clippy::unwrap_used, clippy::expect_used, clippy::panic)]
+mod pdf;
+#[allow(clippy::unwrap_used, clippy::expect_used, clippy::panic)]
+mod pdf_print;
diff --git a/apps/figcraft-cli/tests/pdf.rs b/apps/figcraft-cli/tests/it/pdf.rs
similarity index 97%
rename from apps/figcraft-cli/tests/pdf.rs
rename to apps/figcraft-cli/tests/it/pdf.rs
index 28d5ca6c..185d5b60 100644
--- a/apps/figcraft-cli/tests/pdf.rs
+++ b/apps/figcraft-cli/tests/it/pdf.rs
@@ -1,5 +1,4 @@
 //! `figcraft-cli export --format pdf` and `convert … .pdf` end to end.
-#![allow(clippy::unwrap_used, clippy::expect_used, clippy::panic)]
 
 use std::process::Command;
 
diff --git a/apps/figcraft-cli/tests/pdf_print.rs b/apps/figcraft-cli/tests/it/pdf_print.rs
similarity index 97%
rename from apps/figcraft-cli/tests/pdf_print.rs
rename to apps/figcraft-cli/tests/it/pdf_print.rs
index b2ce3c9a..f12725ed 100644
--- a/apps/figcraft-cli/tests/pdf_print.rs
+++ b/apps/figcraft-cli/tests/it/pdf_print.rs
@@ -1,5 +1,4 @@
 //! `figcraft-cli export` with PDF print options: bleed, marks, CMYK; bad lengths are usage errors.
-#![allow(clippy::unwrap_used, clippy::expect_used, clippy::panic)]
 
 use std::process::Command;
 
diff --git a/apps/figcraft-server/tests/header_recovery.rs b/apps/figcraft-server/tests/it/header_recovery.rs
similarity index 98%
rename from apps/figcraft-server/tests/header_recovery.rs
rename to apps/figcraft-server/tests/it/header_recovery.rs
index d728908d..bb0be1d0 100644
--- a/apps/figcraft-server/tests/header_recovery.rs
+++ b/apps/figcraft-server/tests/it/header_recovery.rs
@@ -2,7 +2,6 @@
 //! holds confirmed edits (#408): the log is replayed over the snapshot, which only the changes the
 //! snapshot lacks survive, and the damage is reported. A genuine leftover of a compaction cut short
 //! still restores silently.
-#![allow(clippy::unwrap_used, clippy::expect_used, clippy::panic)]
 
 use figcraft_collab::message::{Access, ClientMsg};
 use figcraft_collab::{Client, Outgoing, Replica, Server};
diff --git a/apps/figcraft-server/tests/it/main.rs b/apps/figcraft-server/tests/it/main.rs
new file mode 100644
index 00000000..3027ed99
--- /dev/null
+++ b/apps/figcraft-server/tests/it/main.rs
@@ -0,0 +1,5 @@
+//! The crate's integration tests, built as one test binary.
+
+#[allow(clippy::unwrap_used, clippy::expect_used, clippy::panic)]
+mod header_recovery;
+mod problem_retention;
diff --git a/apps/figcraft-server/tests/problem_retention.rs b/apps/figcraft-server/tests/it/problem_retention.rs
similarity index 100%
rename from apps/figcraft-server/tests/problem_retention.rs
rename to apps/figcraft-server/tests/it/problem_retention.rs
diff --git a/crates/engine/tests/empty_text_box_undo.rs b/crates/engine/tests/it/empty_text_box_undo.rs
similarity index 96%
rename from crates/engine/tests/empty_text_box_undo.rs
rename to crates/engine/tests/it/empty_text_box_undo.rs
index ec73b83a..0a302ac2 100644
--- a/crates/engine/tests/empty_text_box_undo.rs
+++ b/crates/engine/tests/it/empty_text_box_undo.rs
@@ -1,5 +1,3 @@
-#![allow(clippy::unwrap_used, clippy::expect_used, clippy::panic)]
-
 use figcraft_engine::{
     Session,
     doc::NodeKind,
diff --git a/crates/engine/tests/library_style_acceptance.rs b/crates/engine/tests/it/library_style_acceptance.rs
similarity index 97%
rename from crates/engine/tests/library_style_acceptance.rs
rename to crates/engine/tests/it/library_style_acceptance.rs
index 233ddc8b..07940132 100644
--- a/crates/engine/tests/library_style_acceptance.rs
+++ b/crates/engine/tests/it/library_style_acceptance.rs
@@ -1,5 +1,4 @@
 //! Accepting a library update that changes only a paint style refreshes the layers linked to it.
-#![allow(clippy::unwrap_used, clippy::expect_used, clippy::panic, clippy::disallowed_methods)]
 
 use figcraft_doc::{NodeId, StyleKind};
 use figcraft_engine::Session;
diff --git a/crates/engine/tests/list_indent_response.rs b/crates/engine/tests/it/list_indent_response.rs
similarity index 97%
rename from crates/engine/tests/list_indent_response.rs
rename to crates/engine/tests/it/list_indent_response.rs
index 1dae8754..e6d47956 100644
--- a/crates/engine/tests/list_indent_response.rs
+++ b/crates/engine/tests/it/list_indent_response.rs
@@ -1,5 +1,4 @@
 //! `text.listIndent` / `text.listOutdent` report `changed` only when the document changed.
-#![allow(clippy::unwrap_used, clippy::expect_used, clippy::panic)]
 
 use figcraft_engine::{
     Session,
diff --git a/crates/engine/tests/it/main.rs b/crates/engine/tests/it/main.rs
new file mode 100644
index 00000000..a97e3434
--- /dev/null
+++ b/crates/engine/tests/it/main.rs
@@ -0,0 +1,14 @@
+//! The crate's integration tests, built as one test binary.
+
+#[allow(clippy::unwrap_used, clippy::expect_used, clippy::panic)]
+mod empty_text_box_undo;
+#[allow(clippy::unwrap_used, clippy::expect_used, clippy::panic, clippy::disallowed_methods)]
+mod library_style_acceptance;
+#[allow(clippy::unwrap_used, clippy::expect_used, clippy::panic)]
+mod list_indent_response;
+#[allow(clippy::unwrap_used, clippy::expect_used, clippy::panic)]
+mod scope_reset;
+#[allow(clippy::unwrap_used)]
+mod selection_colors;
+#[allow(clippy::unwrap_used, clippy::expect_used, clippy::panic)]
+mod shape_builder_response;
diff --git a/crates/engine/tests/scope_reset.rs b/crates/engine/tests/it/scope_reset.rs
similarity index 95%
rename from crates/engine/tests/scope_reset.rs
rename to crates/engine/tests/it/scope_reset.rs
index 6d875d12..1838e8a9 100644
--- a/crates/engine/tests/scope_reset.rs
+++ b/crates/engine/tests/it/scope_reset.rs
@@ -1,5 +1,3 @@
-#![allow(clippy::unwrap_used, clippy::expect_used, clippy::panic)]
-
 use figcraft_engine::Session;
 use serde_json::json;
 
diff --git a/crates/engine/tests/selection_colors.rs b/crates/engine/tests/it/selection_colors.rs
similarity index 99%
rename from crates/engine/tests/selection_colors.rs
rename to crates/engine/tests/it/selection_colors.rs
index e13f9f59..4e559d27 100644
--- a/crates/engine/tests/selection_colors.rs
+++ b/crates/engine/tests/it/selection_colors.rs
@@ -1,5 +1,3 @@
-#![allow(clippy::unwrap_used)]
-
 use figcraft_color::Paint;
 use figcraft_doc::NodeId;
 use figcraft_engine::{
diff --git a/crates/engine/tests/shape_builder_response.rs b/crates/engine/tests/it/shape_builder_response.rs
similarity index 95%
rename from crates/engine/tests/shape_builder_response.rs
rename to crates/engine/tests/it/shape_builder_response.rs
index e1426823..6187e556 100644
--- a/crates/engine/tests/shape_builder_response.rs
+++ b/crates/engine/tests/it/shape_builder_response.rs
@@ -1,4 +1,3 @@
-#![allow(clippy::unwrap_used, clippy::expect_used, clippy::panic)]
 use figcraft_engine::Session;
 use serde_json::{Value, json};
 
diff --git a/crates/format/tests/distributed_alignment.rs b/crates/format/tests/it/distributed_alignment.rs
similarity index 100%
rename from crates/format/tests/distributed_alignment.rs
rename to crates/format/tests/it/distributed_alignment.rs
diff --git a/crates/format/tests/import_link_contract.rs b/crates/format/tests/it/import_link_contract.rs
similarity index 100%
rename from crates/format/tests/import_link_contract.rs
rename to crates/format/tests/it/import_link_contract.rs
diff --git a/crates/format/tests/it/main.rs b/crates/format/tests/it/main.rs
new file mode 100644
index 00000000..6286e8db
--- /dev/null
+++ b/crates/format/tests/it/main.rs
@@ -0,0 +1,5 @@
+//! The crate's integration tests, built as one test binary.
+
+mod distributed_alignment;
+mod import_link_contract;
+mod range_hyperlink_round_trip;
diff --git a/crates/format/tests/range_hyperlink_round_trip.rs b/crates/format/tests/it/range_hyperlink_round_trip.rs
similarity index 100%
rename from crates/format/tests/range_hyperlink_round_trip.rs
rename to crates/format/tests/it/range_hyperlink_round_trip.rs
diff --git a/crates/mcp/tests/agent_tasks.rs b/crates/mcp/tests/it/agent_tasks.rs
similarity index 99%
rename from crates/mcp/tests/agent_tasks.rs
rename to crates/mcp/tests/it/agent_tasks.rs
index b35f3e7f..b83fc3b8 100644
--- a/crates/mcp/tests/agent_tasks.rs
+++ b/crates/mcp/tests/it/agent_tasks.rs
@@ -1,8 +1,7 @@
 //! End-to-end agent tasks: an in-process MCP client completes realistic design tasks only through
 //! MCP tool calls, and checks every result through inspect_document / get_node like an agent would.
-#![allow(clippy::unwrap_used, clippy::expect_used, clippy::panic)]
 
-mod common;
+use crate::common;
 
 use common::{Client, approx, png_dims};
 use serde_json::{Value, json};
diff --git a/crates/mcp/tests/attached.rs b/crates/mcp/tests/it/attached.rs
similarity index 99%
rename from crates/mcp/tests/attached.rs
rename to crates/mcp/tests/it/attached.rs
index 69194604..f1343dd2 100644
--- a/crates/mcp/tests/attached.rs
+++ b/crates/mcp/tests/it/attached.rs
@@ -1,6 +1,5 @@
 //! The attached backend against a fake app: a loopback control server answering with a headless
 //! session, speaking the desktop app's JSON-lines protocol.
-#![allow(clippy::unwrap_used, clippy::expect_used, clippy::panic)]
 
 use std::io::{BufRead, BufReader, Write};
 use std::net::TcpListener;
diff --git a/crates/mcp/tests/automation_roots.rs b/crates/mcp/tests/it/automation_roots.rs
similarity index 98%
rename from crates/mcp/tests/automation_roots.rs
rename to crates/mcp/tests/it/automation_roots.rs
index ced1e145..aa8e1b24 100644
--- a/crates/mcp/tests/automation_roots.rs
+++ b/crates/mcp/tests/it/automation_roots.rs
@@ -1,6 +1,5 @@
 //! `--automation-read-root` / `--automation-write-root` over MCP (#715): a tool call reads only
 //! inside the read and write roots and writes only inside the write roots.
-#![allow(clippy::unwrap_used, clippy::expect_used, clippy::panic, clippy::disallowed_methods)]
 
 use std::path::PathBuf;
 
diff --git a/crates/mcp/tests/common/mod.rs b/crates/mcp/tests/it/common/mod.rs
similarity index 97%
rename from crates/mcp/tests/common/mod.rs
rename to crates/mcp/tests/it/common/mod.rs
index be4dcea2..51e74865 100644
--- a/crates/mcp/tests/common/mod.rs
+++ b/crates/mcp/tests/it/common/mod.rs
@@ -1,5 +1,4 @@
 //! An in-process MCP client: feeds JSON-RPC lines to `Server::handle_line`.
-#![allow(dead_code, clippy::unwrap_used, clippy::expect_used, clippy::panic)]
 
 use figcraft_mcp::Server;
 use serde_json::{Value, json};
diff --git a/crates/mcp/tests/export_hidden_roots.rs b/crates/mcp/tests/it/export_hidden_roots.rs
similarity index 96%
rename from crates/mcp/tests/export_hidden_roots.rs
rename to crates/mcp/tests/it/export_hidden_roots.rs
index ded6f731..0a3b8de4 100644
--- a/crates/mcp/tests/export_hidden_roots.rs
+++ b/crates/mcp/tests/it/export_hidden_roots.rs
@@ -1,7 +1,6 @@
 //! Hidden top-level layers in an export take no room in the image (issue #447).
-#![allow(clippy::unwrap_used, clippy::expect_used, clippy::panic)]
 
-mod common;
+use crate::common;
 
 use common::{Client, png_dims};
 use serde_json::{Value, json};
diff --git a/crates/mcp/tests/garbage.rs b/crates/mcp/tests/it/garbage.rs
similarity index 98%
rename from crates/mcp/tests/garbage.rs
rename to crates/mcp/tests/it/garbage.rs
index 262934c7..5d9e237e 100644
--- a/crates/mcp/tests/garbage.rs
+++ b/crates/mcp/tests/it/garbage.rs
@@ -1,5 +1,4 @@
 //! Fuzz-ish: no input line may crash the server or leave it unable to answer.
-#![allow(clippy::unwrap_used, clippy::expect_used, clippy::panic)]
 
 use figcraft_mcp::{Server, TOOL_NAMES};
 use proptest::prelude::*;
diff --git a/crates/mcp/tests/it/main.rs b/crates/mcp/tests/it/main.rs
new file mode 100644
index 00000000..b5e3d89d
--- /dev/null
+++ b/crates/mcp/tests/it/main.rs
@@ -0,0 +1,18 @@
+//! The crate's integration tests, built as one test binary.
+
+#[allow(clippy::unwrap_used, clippy::expect_used, clippy::panic)]
+mod agent_tasks;
+#[allow(clippy::unwrap_used, clippy::expect_used, clippy::panic)]
+mod attached;
+#[allow(clippy::unwrap_used, clippy::expect_used, clippy::panic, clippy::disallowed_methods)]
+mod automation_roots;
+#[allow(dead_code, clippy::unwrap_used, clippy::expect_used, clippy::panic)]
+mod common;
+#[allow(clippy::unwrap_used, clippy::expect_used, clippy::panic)]
+mod export_hidden_roots;
+#[allow(clippy::unwrap_used, clippy::expect_used, clippy::panic)]
+mod garbage;
+#[allow(clippy::unwrap_used, clippy::expect_used, clippy::panic)]
+mod protocol;
+#[allow(clippy::unwrap_used, clippy::expect_used, clippy::panic)]
+mod screenshot_pixel_limit;
diff --git a/crates/mcp/tests/protocol.rs b/crates/mcp/tests/it/protocol.rs
similarity index 99%
rename from crates/mcp/tests/protocol.rs
rename to crates/mcp/tests/it/protocol.rs
index 6e943a1e..617790f4 100644
--- a/crates/mcp/tests/protocol.rs
+++ b/crates/mcp/tests/it/protocol.rs
@@ -1,7 +1,6 @@
 //! JSON-RPC / MCP protocol behaviour.
-#![allow(clippy::unwrap_used, clippy::expect_used, clippy::panic)]
 
-mod common;
+use crate::common;
 
 use common::Client;
 use figcraft_mcp::{PROTOCOL_VERSION, Server, TOOL_NAMES};
diff --git a/crates/mcp/tests/screenshot_pixel_limit.rs b/crates/mcp/tests/it/screenshot_pixel_limit.rs
similarity index 96%
rename from crates/mcp/tests/screenshot_pixel_limit.rs
rename to crates/mcp/tests/it/screenshot_pixel_limit.rs
index 095992ff..e575f1d5 100644
--- a/crates/mcp/tests/screenshot_pixel_limit.rs
+++ b/crates/mcp/tests/it/screenshot_pixel_limit.rs
@@ -1,6 +1,5 @@
 //! `screenshot` with `ids` must honour `maxSize` for the rendered paint area (shadows, overflow).
-#![allow(clippy::unwrap_used, clippy::expect_used, clippy::panic)]
-mod common;
+use crate::common;
 use common::{Client, png_dims};
 use serde_json::{Value, json};
 
diff --git a/crates/ui-egui/tests/canvas_pan_release.rs b/crates/ui-egui/tests/it/canvas_pan_release.rs
similarity index 98%
rename from crates/ui-egui/tests/canvas_pan_release.rs
rename to crates/ui-egui/tests/it/canvas_pan_release.rs
index c54d20dc..cd1a6e1c 100644
--- a/crates/ui-egui/tests/canvas_pan_release.rs
+++ b/crates/ui-egui/tests/it/canvas_pan_release.rs
@@ -1,6 +1,5 @@
 //! A canvas pan (middle button or Space + primary) ends when its button is released, even when the
 //! release happens over a panel: returning to the canvas with no button held must not move the view.
-#![allow(clippy::unwrap_used, clippy::expect_used, clippy::panic)]
 
 use egui::{Event, Key, PointerButton, Pos2, RawInput, Rect, vec2};
 use figcraft_engine::Session;
diff --git a/crates/ui-egui/tests/comment_open_other_page.rs b/crates/ui-egui/tests/it/comment_open_other_page.rs
similarity index 100%
rename from crates/ui-egui/tests/comment_open_other_page.rs
rename to crates/ui-egui/tests/it/comment_open_other_page.rs
diff --git a/crates/ui-egui/tests/file_menu_pdf.rs b/crates/ui-egui/tests/it/file_menu_pdf.rs
similarity index 97%
rename from crates/ui-egui/tests/file_menu_pdf.rs
rename to crates/ui-egui/tests/it/file_menu_pdf.rs
index 30b847b7..812529e0 100644
--- a/crates/ui-egui/tests/file_menu_pdf.rs
+++ b/crates/ui-egui/tests/it/file_menu_pdf.rs
@@ -1,6 +1,5 @@
 //! File > Export frames to PDF: the menu asks where to save and writes the frames' PDF there,
 //! one visible top-level frame per page.
-#![allow(clippy::unwrap_used, clippy::expect_used, clippy::panic)]
 
 use std::path::PathBuf;
 
diff --git a/crates/ui-egui/tests/guide_label_narrow.rs b/crates/ui-egui/tests/it/guide_label_narrow.rs
similarity index 97%
rename from crates/ui-egui/tests/guide_label_narrow.rs
rename to crates/ui-egui/tests/it/guide_label_narrow.rs
index 6c4276ad..464fbfed 100644
--- a/crates/ui-egui/tests/guide_label_narrow.rs
+++ b/crates/ui-egui/tests/it/guide_label_narrow.rs
@@ -1,5 +1,3 @@
-#![allow(clippy::unwrap_used)]
-
 use egui::{Pos2, RawInput, Rect, Vec2, vec2};
 use figcraft_engine::Session;
 use figcraft_ui_egui::{FigApp, NoServices};
diff --git a/crates/ui-egui/tests/it/main.rs b/crates/ui-egui/tests/it/main.rs
new file mode 100644
index 00000000..007f450d
--- /dev/null
+++ b/crates/ui-egui/tests/it/main.rs
@@ -0,0 +1,11 @@
+//! The crate's integration tests, built as one test binary.
+
+#[allow(clippy::unwrap_used, clippy::expect_used, clippy::panic)]
+mod canvas_pan_release;
+mod comment_open_other_page;
+#[allow(clippy::unwrap_used, clippy::expect_used, clippy::panic)]
+mod file_menu_pdf;
+#[allow(clippy::unwrap_used)]
+mod guide_label_narrow;
+#[allow(clippy::unwrap_used, clippy::expect_used, clippy::panic)]
+mod recent_file_names;
diff --git a/crates/ui-egui/tests/recent_file_names.rs b/crates/ui-egui/tests/it/recent_file_names.rs
similarity index 97%
rename from crates/ui-egui/tests/recent_file_names.rs
rename to crates/ui-egui/tests/it/recent_file_names.rs
index 461d0c73..41e37ec2 100644
--- a/crates/ui-egui/tests/recent_file_names.rs
+++ b/crates/ui-egui/tests/it/recent_file_names.rs
@@ -1,5 +1,4 @@
 //! Recent file rows keep their full accessible name.
-#![allow(clippy::unwrap_used, clippy::expect_used, clippy::panic)]
 
 use egui::{Context, Id, Pos2, RawInput, Rect, accesskit::Role, vec2};
 use figcraft_engine::Session;
diff --git a/docs/mcp.md b/docs/mcp.md
index dfea95cc..211b98d8 100644
--- a/docs/mcp.md
+++ b/docs/mcp.md
@@ -1675,7 +1675,7 @@ other key next to `$step` fails the whole batch, which is rolled back. Only an o
 value too) is read as a reference. A step that is itself a `command.batch` is passed on as written,
 so the references in its steps are to its own steps, not the outer batch's.
 
-The end-to-end tests in `crates/mcp/tests/agent_tasks.rs` are worked examples of realistic tasks
+The end-to-end tests in `crates/mcp/tests/it/agent_tasks.rs` are worked examples of realistic tasks
 (auto layout, a card built in one batch with step references, components and overrides, gradients
 and shadows, paint styles, Light/Dark variables, align/distribute/group, boolean subtract + flatten,
 export, undo/redo, drawing with tools).
diff --git a/xtask/src/main.rs b/xtask/src/main.rs
index e3f00e8b..81d48471 100644
--- a/xtask/src/main.rs
+++ b/xtask/src/main.rs
@@ -1,6 +1,7 @@
 //! Project tasks: `cargo xtask <task>`.
 //!
 //! - `ci`      fmt check, clippy -D warnings, tests, layers, assets, wasm check
+//! - `test`    the workspace tests (nextest when installed) and doctests
 //! - `layers`  crate dependency layering check
 //! - `assets`  every file under assets/ and docs/ has a row in ATTRIBUTION.md
 //! - `parity`  menu-catalog coverage → docs/parity-checklist.md
@@ -16,7 +17,7 @@
 mod icon;
 mod layers;
 
-use std::process::{Command, ExitCode};
+use std::process::{Command, ExitCode, Stdio};
 
 fn run(cmd: &mut Command) -> bool {
     eprintln!("$ {cmd:?}");
@@ -36,6 +37,7 @@ fn main() -> ExitCode {
     let task = args.first().map(String::as_str).unwrap_or("help");
     let ok = match task {
         "ci" => ci(),
+        "test" => test(),
         "layers" => layers::check(&root()),
         "assets" => assets(),
         "parity" => parity(),
@@ -45,7 +47,7 @@ fn main() -> ExitCode {
         "plugins" => plugins(),
         "bench" => bench(args.get(1).map_or("1000,10000,50000", String::as_str)),
         _ => {
-            eprintln!("tasks: ci, layers, assets, parity, version [set X.Y.Z], icon, wasm, plugins, bench [SIZES]");
+            eprintln!("tasks: ci, test, layers, assets, parity, version [set X.Y.Z], icon, wasm, plugins, bench [SIZES]");
             task == "help"
         }
     };
@@ -54,16 +56,31 @@ fn main() -> ExitCode {
 
 fn ci() -> bool {
     run(cargo().args(["fmt", "--all", "--check"]))
-        && run(cargo().args(["clippy", "--workspace", "--all-targets", "--", "-D", "warnings"]))
-        && run(cargo().args(["test", "--workspace"]))
+        && run(cargo().args(["clippy", "--workspace", "--all-targets", "--keep-going", "--", "-D", "warnings"]))
+        && test()
         && layers::check(&root())
         && assets()
         && wasm()
 }
 
+/// Unit and integration tests with nextest when it is installed (`cargo install cargo-nextest`),
+/// else with `cargo test`; then the doctests, which nextest does not run. Examples are not built:
+/// clippy's `--all-targets` already checks them.
+fn test() -> bool {
+    let nextest = cargo().args(["nextest", "--version"]).stdout(Stdio::null()).stderr(Stdio::null()).status().is_ok_and(|s| s.success());
+    let units = if nextest {
+        run(cargo().args(["nextest", "run", "--workspace", "--lib", "--bins", "--tests"]))
+    } else {
+        eprintln!("xtask: cargo-nextest not installed; running unit and integration tests with `cargo test`");
+        run(cargo().args(["test", "--workspace", "--lib", "--bins", "--tests"]))
+    };
+    units && run(cargo().args(["test", "--workspace", "--doc"]))
+}
+
 fn wasm() -> bool {
     run(cargo().args([
         "check",
+        "--keep-going",
         "--target",
         "wasm32-unknown-unknown",
         "-p",