diff --git a/.github/workflows/jewel-checks.yml b/.github/workflows/jewel-checks.yml
index c3128355ca1d..28c2beac8a8d 100644
--- a/.github/workflows/jewel-checks.yml
+++ b/.github/workflows/jewel-checks.yml
@@ -214,6 +214,81 @@ jobs:
           fi
           echo "Bazel build files look up-to-date."
 
+  spectre_tests:
+    name: Jewel Spectre tests
+    runs-on: ubuntu-latest
+    defaults:
+      run:
+        working-directory: .
+
+    steps:
+      - uses: actions/checkout@v7.0.1
+        name: Check out repository
+
+      - name: Install Xvfb
+        # libxrandr2 and libxinerama1 are dlopened, so nothing reports them missing.
+        # language=bash
+        run: |
+          sudo apt-get update
+          sudo apt-get install -y --no-install-recommends \
+            xvfb \
+            libxrender1 \
+            libxtst6 \
+            libxi6 \
+            libxrandr2 \
+            libxinerama1 \
+            libgl1 \
+            libfontconfig1
+
+      - name: Run the Spectre headful UI tests
+        run: |
+          xvfb-run --auto-servernum --server-args="-screen 0 1920x1080x24" \
+            ./bazel.cmd test //platform/jewel/... \
+              --build_tests_only \
+              --test_tag_filters=requires-display \
+              --test_output=errors
+
+      - name: Upload Bazel test logs
+        uses: actions/upload-artifact@v7.0.1
+        if: failure()
+        with:
+          name: spectre-test-logs
+          path: out/bazel-testlogs/platform/jewel/**
+          retention-days: 7
+          if-no-files-found: ignore
+
+  spectre_tests_windows:
+    name: Jewel Spectre tests (Windows)
+    runs-on: windows-latest
+    defaults:
+      run:
+        working-directory: .
+
+    steps:
+      # Kotlin test data blows past MAX_PATH, so checkout fails with "Filename too long" without this.
+      - name: Enable long paths
+        run: git config --global core.longpaths true
+
+      - uses: actions/checkout@v7.0.1
+        name: Check out repository
+
+      - name: Run the Spectre headful UI tests
+        # Not redundant: JDialogRenderer uses RenderSettings.SwingGraphics on Windows.
+        run: >
+          ./bazel.cmd test //platform/jewel/...
+          --build_tests_only
+          --test_tag_filters=requires-display
+          --test_output=errors
+
+      - name: Upload Bazel test logs
+        uses: actions/upload-artifact@v7.0.1
+        if: failure()
+        with:
+          name: spectre-test-logs-windows
+          path: out/bazel-testlogs/platform/jewel/**
+          retention-days: 7
+          if-no-files-found: ignore
+
   metalava:
     name: Check for breaking API changes with Metalava
     runs-on: ubuntu-latest
diff --git a/platform/jewel/BUILD.bazel b/platform/jewel/BUILD.bazel
index e69de29bb2d1..83fec6a65b3d 100644
--- a/platform/jewel/BUILD.bazel
+++ b/platform/jewel/BUILD.bazel
@@ -0,0 +1,102 @@
+load("@rules_java//java:defs.bzl", "java_library")
+load("@rules_kotlin//kotlin:jvm.bzl", "kt_jvm_import")
+
+filegroup(
+    name = "jewel_build_metadata",
+    srcs = [
+        "JEWEL_MARKER",
+        "gradle.properties",
+        "gradle/libs.versions.toml",
+    ],
+    visibility = ["//visibility:public"],
+)
+
+# Spectre (JEWEL-1390). `testonly` is what keeps it out of the IDE and published artifacts.
+
+kt_jvm_import(
+    name = "spectre-core",
+    testonly = True,
+    jar = "@jewel_deps_spectre_core//file",
+    visibility = ["//visibility:private"],
+)
+
+kt_jvm_import(
+    name = "spectre-testing",
+    testonly = True,
+    jar = "@jewel_deps_spectre_testing//file",
+    visibility = ["//visibility:private"],
+)
+
+kt_jvm_import(
+    name = "spectre-agent",
+    testonly = True,
+    jar = "@jewel_deps_spectre_agent//file",
+    visibility = ["//visibility:private"],
+)
+
+kt_jvm_import(
+    name = "spectre-recording",
+    testonly = True,
+    jar = "@jewel_deps_spectre_recording//file",
+    visibility = ["//visibility:private"],
+)
+
+kt_jvm_import(
+    name = "androidx-tracing-wire-desktop",
+    testonly = True,
+    jar = "@jewel_deps_androidx_tracing_wire_desktop//file",
+    visibility = ["//visibility:private"],
+)
+
+kt_jvm_import(
+    name = "kotlinx-coroutines-swing",
+    testonly = True,
+    jar = "@jewel_deps_kotlinx_coroutines_swing//file",
+    visibility = ["//visibility:private"],
+)
+
+# Compose, coroutines and kotlin-stdlib are deliberately not exported: the tested module
+# brings them, and a second copy would shadow the monorepo's versions.
+java_library(
+    name = "spectre",
+    testonly = True,
+    visibility = ["//visibility:public"],
+    exports = [
+        ":spectre-core",
+        ":spectre-testing",
+    ],
+    runtime_deps = [
+        ":androidx-tracing-wire-desktop",
+        ":kotlinx-coroutines-swing",
+        ":spectre-agent",
+        ":spectre-recording",
+    ],
+)
+
+kt_jvm_import(
+    name = "junit-platform-console",
+    testonly = True,
+    jar = "@jewel_deps_junit_platform_console//file",
+    visibility = ["//visibility:private"],
+)
+
+kt_jvm_import(
+    name = "junit-platform-reporting",
+    testonly = True,
+    jar = "@jewel_deps_junit_platform_reporting//file",
+    visibility = ["//visibility:private"],
+)
+
+# Only the console front end is Jewel-local; the JUnit Platform itself comes from //libraries.
+java_library(
+    name = "spectre-junit-console",
+    testonly = True,
+    visibility = ["//visibility:public"],
+    runtime_deps = [
+        ":junit-platform-console",
+        ":junit-platform-reporting",
+        "//libraries/junit5",
+        "//libraries/junit5-jupiter",
+        "//libraries/junit5-launcher",
+    ],
+)
diff --git a/platform/jewel/docs/bazel-build-tips.md b/platform/jewel/docs/bazel-build-tips.md
index 2cd301c09e7d..1e4f483d4680 100644
--- a/platform/jewel/docs/bazel-build-tips.md
+++ b/platform/jewel/docs/bazel-build-tips.md
@@ -61,6 +61,76 @@ diff --git a/platform/testFramework/monorepo/BUILD.bazel b/platform/testFramewor
 
 But... Please double-check the dumps it changed before pushing.
 
+## Running the Spectre headful UI tests
+
+[Spectre](https://spectre.sebastiano.dev) drives a real Compose Desktop window, so its tests need a display and a
+non-headless JVM. That rules out `jps_test`, which forces `-Djava.awt.headless=true` and puts the IntelliJ test
+runtime on the classpath — the latter would hide exactly the standalone-runtime leaks these tests exist to catch.
+The lane therefore uses the `spectre_test` macro in [spectre.bzl](../spectre.bzl), which runs the JUnit Platform
+console launcher on a classpath containing only the module under test, Compose, and Spectre.
+
+These are ordinary test targets. On any machine with a display they run as part of `bazel test //platform/jewel/...`,
+or on their own:
+
+```bash
+./bazel.cmd test //platform/jewel/int-ui/int-ui-standalone-tests:jewel-intUi-standalone-spectre-tests
+```
+
+Windows will open and close on your desktop while they run; synthetic input goes to the test window, so you can keep
+working, but do not be surprised by the flicker.
+
+Every Spectre target is tagged `requires-display`. That tag is both the CI routing hint and the escape hatch: a lane
+that genuinely has no display skips them with `--test_tag_filters=-requires-display`.
+
+### Scope: standalone only
+
+This lane covers **standalone** Jewel, and cannot be extended to the IJP bridge. Spectre automates a Compose Desktop
+window; inside the IDE a Jewel popup is a `JBPopup` hosting a `ComposePanel`, and the application under test is the
+IDE itself. So `JBPopupRenderer` and the other bridge renderers currently have **no headful coverage at all** — only
+the Compose UI unit tests in `ui-tests`. That gap is JEWEL-1397, which is IDE Starter / UI Driver work rather than
+Spectre work. Do not try to add a bridge test to `src/spectreTest`; it cannot run there.
+
+### Adding a Spectre test
+
+Put the class under a `src/spectreTest/kotlin` source root, in a package under `org.jetbrains.jewel`, and you are
+done — there is no list of test classes to keep in sync.
+
+Discovery is by package (`--select-package`), which JUnit resolves through the class loader. Both obvious
+alternatives are broken under Bazel, and each fails silently rather than loudly:
+
+- a bare `--scan-classpath` scans only classpath *directories*, and under Bazel every classpath entry is a jar;
+- `--scan-classpath=<jar path>` assumes a runfiles symlink tree, so it finds nothing on Windows, where Bazel uses a
+  runfiles manifest instead.
+
+That is why the macro also passes `--fail-if-no-tests`: it turns any future variant of that mistake into a red lane
+instead of a green one that ran nothing.
+
+### CI
+
+Spectre targets are meant to run on **both** CI systems, and neither needs a target list — both select by tag, so a
+new `spectre_test` target anywhere under `platform/jewel` joins CI on its own:
+
+```bash
+bazel test //platform/jewel/... --build_tests_only --test_tag_filters=requires-display
+```
+
+**GitHub Actions** runs two jobs from [jewel-checks.yml](../../../.github/workflows/jewel-checks.yml): `Jewel Spectre
+tests` on Linux under Xvfb, and `Jewel Spectre tests (Windows)`, which needs no display setup because Windows always
+hands the process a window station.
+
+**TeamCity / Patronus** should run them alongside the headful IJP tests, on display-capable agents. That
+configuration lives internally and there is nothing in this repository that drives it — the command above is the
+whole contract, and `requires-display` is the tag to route on. A headless agent that picks up `//platform/jewel/...`
+must exclude them with `--test_tag_filters=-requires-display`, or every Spectre test will fail in `XToolkit`'s
+static initialiser.
+
+Windows is not redundant coverage: `JDialogRenderer` renders popups through `RenderSettings.SwingGraphics` there
+rather than Compose's default, with a different transparency hack, so it is a genuinely different code path.
+
+Spectre itself is declared in [jewel_deps.MODULE.bazel](../jewel_deps.MODULE.bazel) and exposed as the `testonly`
+target `//platform/jewel:spectre`. Keep it that way: `testonly` is what makes Bazel refuse to let a production target
+depend on it, which is how Spectre stays out of the IDE and out of published Jewel artifacts.
+
 ## Add Devkit to IDE Build
 
 On JPS we had a handy run configuration that built the IDE with the devkit bundled. On Bazel, the `idea_community`
diff --git a/platform/jewel/int-ui/int-ui-standalone-tests/BUILD.bazel b/platform/jewel/int-ui/int-ui-standalone-tests/BUILD.bazel
index 0e8a5f2ca478..8f368da02cc0 100644
--- a/platform/jewel/int-ui/int-ui-standalone-tests/BUILD.bazel
+++ b/platform/jewel/int-ui/int-ui-standalone-tests/BUILD.bazel
@@ -1,6 +1,45 @@
 load("@community//build:tests-options.bzl", "jps_test")
 load("@rules_jvm//:jvm.bzl", "jvm_library")
 load("//build:compiler-options.bzl", "create_kotlinc_options")
+load("//platform/jewel:spectre.bzl", "spectre_test")
+
+# Headful Spectre UI tests (JEWEL-1390). Hand-written, and outside the JPS model on purpose:
+# the closure must stay standalone; StandaloneRuntimeSmokeTest is what enforces that.
+create_kotlinc_options(
+    name = "custom_jewel-intUi-standalone-spectre-tests",
+    opt_in = [
+        "androidx.compose.ui.ExperimentalComposeUiApi",
+        "androidx.compose.foundation.ExperimentalFoundationApi",
+        "org.jetbrains.jewel.foundation.ExperimentalJewelApi",
+        "org.jetbrains.jewel.foundation.InternalJewelApi",
+    ],
+    x_context_parameters = True,
+)
+
+spectre_test(
+    name = "jewel-intUi-standalone-spectre-tests",
+    srcs = glob(
+        ["src/spectreTest/kotlin/**/*.kt"],
+        allow_empty = True,
+    ),
+    # The tests assert that JDialogRenderer, not the Compose popup, is the renderer under test.
+    jvm_flags = ["-Djewel.customPopupRender=true"],
+    kotlinc_opts = ":custom_jewel-intUi-standalone-spectre-tests",
+    module_name = "intellij.platform.jewel.intUi.standalone.spectreTests",
+    visibility = ["//visibility:public"],
+    # Icon resources only; adds no IntelliJ Platform classes to the closure.
+    runtime_deps = ["//platform/icons"],
+    deps = [
+        "//libraries/compose-foundation-desktop",
+        "//libraries/junit5",
+        "//libraries/kotlinx/coroutines/core",
+        "//platform/jewel/foundation",
+        "//platform/jewel/int-ui/int-ui-standalone:jewel-intUi-standalone",
+        "//platform/jewel/ui",
+        "@lib//:kotlin-stdlib",
+        "@lib//:kotlin-test",
+    ],
+)
 
 ### auto-generated section `build intellij.platform.jewel.intUi.standalone.tests` start
 
diff --git a/platform/jewel/int-ui/int-ui-standalone-tests/src/spectreTest/kotlin/org/jetbrains/jewel/intui/standalone/StandaloneRuntimeSmokeTest.kt b/platform/jewel/int-ui/int-ui-standalone-tests/src/spectreTest/kotlin/org/jetbrains/jewel/intui/standalone/StandaloneRuntimeSmokeTest.kt
new file mode 100644
index 000000000000..8c3b79f7a7f1
--- /dev/null
+++ b/platform/jewel/int-ui/int-ui-standalone-tests/src/spectreTest/kotlin/org/jetbrains/jewel/intui/standalone/StandaloneRuntimeSmokeTest.kt
@@ -0,0 +1,49 @@
+// Copyright 2000-2026 JetBrains s.r.o. and contributors. Use of this source code is governed by the Apache 2.0 license.
+package org.jetbrains.jewel.intui.standalone
+
+import java.io.File
+import java.util.jar.JarFile
+import kotlin.test.assertTrue
+import org.junit.jupiter.api.Test
+
+// Guards the property that makes this lane worth having, and the reason it is not a jps_test: that runner puts the
+// IntelliJ test runtime on the classpath itself, so it could never assert this.
+class StandaloneRuntimeSmokeTest {
+    @Test
+    fun `only the icons API is on the classpath from com dot intellij`() {
+        val offenders = classpathJars().map { it to it.unexpectedIntellijClassCount() }.filter { (_, n) -> n > 0 }
+
+        assertTrue(
+            offenders.isEmpty(),
+            "The IntelliJ Platform has leaked into the standalone lane via: " +
+                offenders.joinToString { (jar, n) -> "${jar.name} ($n classes)" },
+        )
+    }
+
+    @Test
+    fun `the IntelliJ Application class cannot be loaded`() {
+        val loaded = runCatching { Class.forName("com.intellij.openapi.application.Application") }.isSuccess
+
+        assertTrue(!loaded, "com.intellij.openapi.application.Application must not be reachable from this lane")
+    }
+
+    private fun classpathJars(): List<File> =
+        System.getProperty("java.class.path").split(File.pathSeparatorChar).map(::File).filter {
+            it.isFile && it.name.endsWith(".jar")
+        }
+
+    private fun File.unexpectedIntellijClassCount(): Int =
+        JarFile(this).use { jar ->
+            jar.entries().asSequence().count { entry ->
+                entry.name.startsWith("com/intellij/") &&
+                    entry.name.endsWith(".class") &&
+                    ALLOWED_PACKAGES.none { entry.name.startsWith(it) }
+            }
+        }
+
+    private companion object {
+        // Standalone Jewel depends on the icons API and its implementation on purpose (the jb-icons-* modules), so
+        // this is the one com.intellij package the lane is allowed to see. Anything else is a leak.
+        private val ALLOWED_PACKAGES = listOf("com/intellij/platform/icons/")
+    }
+}
diff --git a/platform/jewel/int-ui/int-ui-standalone-tests/src/spectreTest/kotlin/org/jetbrains/jewel/intui/standalone/popup/CustomPopupRendererSpectreTest.kt b/platform/jewel/int-ui/int-ui-standalone-tests/src/spectreTest/kotlin/org/jetbrains/jewel/intui/standalone/popup/CustomPopupRendererSpectreTest.kt
index 4a9e34e185c0..d37af476b23e 100644
--- a/platform/jewel/int-ui/int-ui-standalone-tests/src/spectreTest/kotlin/org/jetbrains/jewel/intui/standalone/popup/CustomPopupRendererSpectreTest.kt
+++ b/platform/jewel/int-ui/int-ui-standalone-tests/src/spectreTest/kotlin/org/jetbrains/jewel/intui/standalone/popup/CustomPopupRendererSpectreTest.kt
@@ -41,7 +41,9 @@ import org.jetbrains.jewel.ui.component.rememberSpeedSearchState
 import org.jetbrains.jewel.ui.component.search.SpeedSearchableComboBox
 import org.junit.jupiter.api.Test
 
-// Note: these tests run intentionally Gradle-only until JEWEL-1390
+// Headful, and deliberately not a jps_test: the app under test must keep a standalone-only runtime closure,
+// with no IntelliJ Platform classes on the classpath. Runs in CI on any agent with a display:
+//   bazel test //platform/jewel/int-ui/int-ui-standalone-tests:jewel-intUi-standalone-spectre-tests
 class CustomPopupRendererSpectreTest {
     @Test
     fun `escape closes a hovered combo box`(): Unit = runSpectreTestWithCustomPopupRenderer {
diff --git a/platform/jewel/jewel_deps.MODULE.bazel b/platform/jewel/jewel_deps.MODULE.bazel
index 1ca4ac195505..2cb82ada997a 100644
--- a/platform/jewel/jewel_deps.MODULE.bazel
+++ b/platform/jewel/jewel_deps.MODULE.bazel
@@ -20,3 +20,66 @@ http_file(
     sha256 = "3afe89a11120303c73c9bdda3d8fe558dd9070a6937d27819ddc04b275381245",
     url = "https://cache-redirector.jetbrains.com/repo1.maven.org/maven2/io/gitlab/arturbosch/detekt/detekt-cli/1.23.8/detekt-cli-1.23.8-all.jar",
 )
+
+# Spectre (JEWEL-1390). Declared here rather than in `lib/MODULE.bazel` so it cannot reach the
+# IDE or a published artifact.
+http_file(
+    name = "jewel_deps_spectre_core",
+    downloaded_file_path = "spectre-core-0.5.0.jar",
+    sha256 = "1a81c7a259f38646673e8ddc75477f067f13615bc0bbe54454fd3d32b2980bd9",
+    url = "https://cache-redirector.jetbrains.com/repo1.maven.org/maven2/dev/sebastiano/spectre/spectre-core/0.5.0/spectre-core-0.5.0.jar",
+)
+
+http_file(
+    name = "jewel_deps_spectre_testing",
+    downloaded_file_path = "spectre-testing-0.5.0.jar",
+    sha256 = "0856b8d2758ffb436910bde53cd35f947d9873ff37173787c796fc6a49f6ff94",
+    url = "https://cache-redirector.jetbrains.com/repo1.maven.org/maven2/dev/sebastiano/spectre/spectre-testing/0.5.0/spectre-testing-0.5.0.jar",
+)
+
+# Compile dependency of spectre-testing; unused by the in-process lane, but must resolve.
+http_file(
+    name = "jewel_deps_spectre_agent",
+    downloaded_file_path = "spectre-agent-0.5.0.jar",
+    sha256 = "6a6e81b0986456ecb1bce0b79c31a2ece46e747666be284fe12cdc1cebb2fb3d",
+    url = "https://cache-redirector.jetbrains.com/repo1.maven.org/maven2/dev/sebastiano/spectre/spectre-agent/0.5.0/spectre-agent-0.5.0.jar",
+)
+
+# Runtime dependency of spectre-testing.
+http_file(
+    name = "jewel_deps_spectre_recording",
+    downloaded_file_path = "spectre-recording-0.5.0.jar",
+    sha256 = "ab44895f231546d0209924caa4f429f9a2fd700f499f9d1b34dcb92a39431f80",
+    url = "https://cache-redirector.jetbrains.com/repo1.maven.org/maven2/dev/sebastiano/spectre/spectre-recording/0.5.0/spectre-recording-0.5.0.jar",
+)
+
+# Runtime dependency of spectre-core, not otherwise in the monorepo.
+http_file(
+    name = "jewel_deps_androidx_tracing_wire_desktop",
+    downloaded_file_path = "tracing-wire-desktop-2.0.0-alpha06.jar",
+    sha256 = "c6cb73c39f1179673686ca4dc56152844e0ace52087243cfef60fee261ec1934",
+    url = "https://cache-redirector.jetbrains.com/dl.google.com/dl/android/maven2/androidx/tracing/tracing-wire-desktop/2.0.0-alpha06/tracing-wire-desktop-2.0.0-alpha06.jar",
+)
+
+# Runtime dependency of spectre-core.
+http_file(
+    name = "jewel_deps_kotlinx_coroutines_swing",
+    downloaded_file_path = "kotlinx-coroutines-swing-1.10.2.jar",
+    sha256 = "02bdb85f20ec08004429abf6887e8d0e40f3ab637d7462f817f0f8abbe7d1eb5",
+    url = "https://cache-redirector.jetbrains.com/repo1.maven.org/maven2/org/jetbrains/kotlinx/kotlinx-coroutines-swing/1.10.2/kotlinx-coroutines-swing-1.10.2.jar",
+)
+
+# Entry point of the headful lane. Version must match the JUnit Platform in `lib`.
+http_file(
+    name = "jewel_deps_junit_platform_console",
+    downloaded_file_path = "junit-platform-console-1.14.4.jar",
+    sha256 = "8fba295a9aaced613062b7a8486758b71418e1545a3775de8df9ed76cc062383",
+    url = "https://cache-redirector.jetbrains.com/repo1.maven.org/maven2/org/junit/platform/junit-platform-console/1.14.4/junit-platform-console-1.14.4.jar",
+)
+
+http_file(
+    name = "jewel_deps_junit_platform_reporting",
+    downloaded_file_path = "junit-platform-reporting-1.14.4.jar",
+    sha256 = "4a1d32f0f09d29f046ca51a81b8bfbc0f829392892672ea2e2cd530cd9c4b212",
+    url = "https://cache-redirector.jetbrains.com/repo1.maven.org/maven2/org/junit/platform/junit-platform-reporting/1.14.4/junit-platform-reporting-1.14.4.jar",
+)
diff --git a/platform/jewel/spectre.bzl b/platform/jewel/spectre.bzl
new file mode 100644
index 000000000000..0d1122195cee
--- /dev/null
+++ b/platform/jewel/spectre.bzl
@@ -0,0 +1,96 @@
+"""Headful Compose Desktop UI tests driven by Spectre (JEWEL-1390).
+
+Runs the JUnit Platform console launcher rather than `jps_test`, which forces headless mode and
+pulls in the IntelliJ test runtime. See platform/jewel/docs/bazel-build-tips.md.
+"""
+
+load("@rules_java//java:defs.bzl", "java_test")
+load("@rules_jvm//:jvm.bzl", "jvm_library")
+
+SPECTRE_JVM_FLAGS = [
+    "-Djava.awt.headless=false",
+    # Keeps the test window out of the macOS Dock.
+    "-Dapple.awt.UIElement=true",
+    "-ea",
+]
+
+# Not `manual`: CI is meant to run these. `requires-display` is the opt-out handle.
+SPECTRE_TAGS = [
+    "requires-display",
+    "no-sandbox",
+    "local",
+    "external",
+]
+
+def spectre_test(
+        name,
+        srcs,
+        module_name,
+        test_packages = ["org.jetbrains.jewel"],
+        deps = [],
+        runtime_deps = [],
+        kotlinc_opts = None,
+        jvm_flags = [],
+        tags = [],
+        size = "medium",
+        data = [],
+        visibility = None,
+        **kwargs):
+    """Compiles and runs a set of headful Spectre UI tests.
+
+    Args:
+        name: Target name. The compiled test sources land in `<name>_lib`.
+        srcs: Kotlin sources of the tests.
+        module_name: Kotlin module name for the compiled test sources.
+        test_packages: Root packages to discover tests in. The default covers all of Jewel.
+        deps: Compile dependencies. `//platform/jewel:spectre` is always added.
+        runtime_deps: Extra runtime-only dependencies.
+        kotlinc_opts: Label of the `create_kotlinc_options` target to compile with.
+        jvm_flags: Extra JVM flags, appended after `SPECTRE_JVM_FLAGS`.
+        tags: Extra tags, appended after `SPECTRE_TAGS`.
+        size: Bazel test size. Headful tests start a real app, so the default is `medium`.
+        data: Runfiles needed by the tests.
+        visibility: Visibility of the test target.
+        **kwargs: Passed through to `java_test`.
+    """
+    lib_name = name + "_lib"
+
+    jvm_library(
+        name = lib_name,
+        testonly = True,
+        srcs = srcs,
+        kotlinc_opts = kotlinc_opts,
+        module_name = module_name,
+        visibility = ["//visibility:private"],
+        deps = deps + ["//platform/jewel:spectre"],
+        runtime_deps = runtime_deps,
+    )
+
+    java_test(
+        name = name,
+        main_class = "org.junit.platform.console.ConsoleLauncher",
+        use_testrunner = False,
+        # Both `--scan-classpath` forms silently find nothing under Bazel: bare scans only
+        # directories, and `=<jar>` needs a runfiles symlink tree, which Windows lacks.
+        args = [
+            "execute",
+            "--fail-if-no-tests",
+            "--details=tree",
+            "--disable-ansi-colors",
+        ] + ["--select-package=" + test_package for test_package in test_packages],
+        jvm_flags = SPECTRE_JVM_FLAGS + jvm_flags,
+        # Bazel scrubs the test environment; without these AWT falls back to `:0.0` and fails.
+        env_inherit = [
+            "DISPLAY",
+            "XAUTHORITY",
+        ],
+        runtime_deps = [
+            ":" + lib_name,
+            "//platform/jewel:spectre-junit-console",
+        ],
+        tags = SPECTRE_TAGS + tags,
+        size = size,
+        data = data,
+        visibility = visibility,
+        **kwargs
+    )