diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index c9b5a27..4fb7b47 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -616,7 +616,8 @@ jobs:
       - name: The Marketplace submission would name this verified plugin
         run: |
           set -euo pipefail
-          version="$(sed -n 's/^version *= *"\(.*\)"/\1/p' mcpp.toml | head -1)"
+          # The plugin's own version: a component's patch moves it apart from the backend's (mcpp.toml).
+          version="$(sed -n 's/^pluginVersion *= *//p' mide-plugins/clion/gradle.properties | head -1)"
           archive="mide-plugins/clion/build/distributions/mcpp-clion-$version.zip"
           test -f "$archive"
           digest="$(sha256sum "$archive" | cut -d ' ' -f1)"
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 60a4f69..7df5826 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,6 +4,16 @@ The changelog is kept by series (`X.Y`); each section lists its components' rele
 
 ## 1.2
 
+### backend 1.2.1
+
+- **mtest's cases as mtest reads them.** The cases of a file of mtest are read with mtest's own
+  static manifest (`mcpplibs.mtest.manifest` 0.4.1) instead of a reader of the backend's: an object
+  (`UTest parse{"parse", [] { ... }}`, and `Suite`, `CTS`, `E2E`, `Bench` or a suite type derived from
+  one) is a case, and so is each `"name"_test` it declares, under its name. A suite type the project's
+  tests declare in a module beside them (`class Fixture : public CTS` in `tests/cts/cts.cppm`) is read
+  from `tests/` and holds in every file that uses it. A file written for mtest 0.3 or 0.4 shows its
+  cases before it is built, as one written for 0.2 did.
+
 ### 1.2.0
 
 The first series of one version for every component: the backend, mcpp-vscode, mcpp-clion and
diff --git a/mcpp.lock b/mcpp.lock
index 7cced65..6b1ee90 100644
--- a/mcpp.lock
+++ b/mcpp.lock
@@ -81,6 +81,12 @@ source  = "index+mcpplibs@0.4.0"
 hash    = "fnv1a:c06e4aa4f73f1f27"
 targets = ["aarch64-openkal", "x86_64-linux-gnu", "x86_64-openkal"]
 
+[package."mcpplibs.mtest.manifest"]
+namespace = "mcpplibs.mtest"
+version = "0.4.1"
+source  = "index+mcpplibs.mtest@0.4.1"
+hash    = "fnv1a:0339d37dd3c40581"
+
 [package."nlohmann.json"]
 namespace = "nlohmann"
 version = "3.12.0"
diff --git a/mcpp.toml b/mcpp.toml
index f8075dc..8627ffd 100644
--- a/mcpp.toml
+++ b/mcpp.toml
@@ -9,7 +9,7 @@
 # M2/M3), where the system it runs upon is answered when the image is loaded.
 [package]
 name        = "mcpp-ide"
-version     = "1.2.0"
+version     = "1.2.1"
 description = "The IDE backend for mcpp: sessions, jobs, records and view models over mcpp's control contract"
 license     = "Apache-2.0"
 authors     = ["mcpp-community"]
@@ -80,6 +80,8 @@ main = "src/bin/dev.cpp"
 # runtime and loader remain the platform's.
 mcpplibs.os   = "0.4.0"
 nlohmann.json = "3.12.0"
+# mtest's static case manifest: the cases a test file declares, read as mtest reads them.
+mcpplibs.mtest.manifest = "0.4.1"
 
 # What every backend test shares (testsupport/): a module, as the backend's units are.
 [dev-dependencies]
diff --git a/src/scan.cppm b/src/scan.cppm
index 0d0cc41..b3947b4 100644
--- a/src/scan.cppm
+++ b/src/scan.cppm
@@ -13,6 +13,7 @@
 export module mcppide.scan;
 
 import std;
+import mcpplibs.mtest.manifest;
 
 export namespace mcppide::scan {
 
@@ -25,8 +26,10 @@ struct Call {
     std::vector<std::string> arguments;
 };
 
-// A case of the mtest library (`"name"_test`): its identifier -- the names of the suites it is
-// declared in and its own, joined by `/` -- and where its name is (0-based).
+// A case of the mtest library -- an object (`UTest parse{"parse", ...}`, any suite type) or a
+// `"name"_test` declared in one -- as mtest's own static manifest reads it
+// (mcpplibs.mtest.manifest): its identifier, the names of what declares it and its own joined by
+// `/`, and where its name is (0-based).
 struct Literal {
     std::string id;
     int line = 0;
@@ -36,11 +39,13 @@ struct Literal {
 struct Result {
     std::optional<int> mainLine;   // 0-based
     std::vector<Call> calls;
-    std::vector<Literal> cases;    // `"name"_test`, in `suite x{"name", ...}` scopes
+    std::vector<Literal> cases;    // mtest's cases, by mcpplibs.mtest.manifest
 };
 
-// Scans `text` for `main` and for calls of the macros named in `macros`.
-Result scan(std::string_view text, const std::vector<std::string>& macros);
+// Scans `text` for `main` and for calls of the macros named in `macros`. `types` are the suite types
+// the project's tests declare elsewhere (`class Fixture : public CTS` in a module beside them).
+Result scan(std::string_view text, const std::vector<std::string>& macros,
+            const mcpplibs::mtest::manifest::suite_types& types = {});
 
 // A string literal's contents, as the program sees them for the plain escapes (\" \\ \n \t); the
 // argument itself when it is not one literal. Adjacent literals are joined.
@@ -157,24 +162,14 @@ std::vector<std::string> arguments(Cursor& c) {
 
 }  // namespace
 
-Result scan(std::string_view text, const std::vector<std::string>& macros) {
+Result scan(std::string_view text, const std::vector<std::string>& macros,
+            const mcpplibs::mtest::manifest::suite_types& types) {
     Result r;
     Cursor c{text};
     int depth = 0;                  // braces
     bool atDeclaration = true;      // the next identifier starts a declaration
     bool lineHasCode = false;       // a `#` is a directive only first on its line
     std::string previous;           // the previous identifier, for `int main(`
-    // A suite of the mtest library: `suite <name>{"<id>", ...}`, whose `{` opens the scope its
-    // cases' identifiers are prefixed in. `suiteState` follows the declaration: 1 after `suite`,
-    // 2 after its variable's name, 3 after the `{` (the next literal is the suite's identifier).
-    struct Scope { std::string name; int depth; };
-    std::vector<Scope> suites;
-    int suiteState = 0, suiteDepth = 0;
-    auto prefix = [&] {
-        std::string out;
-        for (const auto& s : suites) if (!s.name.empty()) out += s.name + "/";
-        return out;
-    };
     while (!c.done()) {
         const char ch = c.peek();
         if (ch == '\n') { lineHasCode = false; c.step(); continue; }
@@ -185,16 +180,7 @@ Result scan(std::string_view text, const std::vector<std::string>& macros) {
         lineHasCode = true;
         if (c.on_raw()) { c.skip_raw(); atDeclaration = false; previous.clear(); continue; }
         if (ch == '"') {
-            const auto from = c.at;
-            const int line = c.line, column = c.column();
             c.skip_quoted(ch);
-            const auto value = literal_value(text.substr(from, c.at - from));
-            if (suiteState == 3) {
-                suites.push_back({value, suiteDepth});
-                suiteState = 0;
-            } else if (text.substr(c.at, 5) == "_test" && !(c.at + 5 < text.size() && ident_char(text[c.at + 5]))) {
-                r.cases.push_back(Literal{prefix() + value, line, column});
-            }
             atDeclaration = false;
             previous.clear();
             continue;
@@ -214,10 +200,6 @@ Result scan(std::string_view text, const std::vector<std::string>& macros) {
                 break;
             }
             const bool call = look.peek() == '(';
-            // `suite`, or `mtest::suite` (the identifier before `::` is kept in `previous`).
-            if (word == "suite" && (atDeclaration || previous == "mtest")) suiteState = 1;
-            else if (suiteState == 1) suiteState = 2;
-            else suiteState = 0;
             if (call && atDeclaration && std::ranges::find(macros, word) != macros.end()) {
                 c = look;
                 r.calls.push_back(Call{word, line, column, arguments(c)});
@@ -232,21 +214,21 @@ Result scan(std::string_view text, const std::vector<std::string>& macros) {
             continue;
         }
         if (ch == '{') {
-            if (suiteState == 2) { suiteState = 3; suiteDepth = depth; }
-            else suiteState = 0;
             ++depth;
             atDeclaration = true;
         } else if (ch == '}') {
             if (depth > 0) --depth;
-            while (!suites.empty() && suites.back().depth >= depth) suites.pop_back();
             atDeclaration = true;
         }
-        else if (ch == ';') { atDeclaration = true; suiteState = 0; }
-        else { atDeclaration = false; suiteState = 0; }
+        else if (ch == ';') atDeclaration = true;
+        else atDeclaration = false;
         // `std::main`, `x.main`: not the program's.
         if (ch != ':' ) previous.clear();
         c.step();
     }
+    // mtest's cases as mtest reads them: its manifest is the one reader of its declarations.
+    for (const auto& found : mcpplibs::mtest::manifest::scan(text, types))
+        r.cases.push_back(Literal{found.id, found.line - 1, found.column - 1});
     return r;
 }
 
diff --git a/src/server.cppm b/src/server.cppm
index c0912c3..ddd97c4 100644
--- a/src/server.cppm
+++ b/src/server.cppm
@@ -26,6 +26,7 @@ import mcppide.documents;
 import mcppide.spec;
 import mcppide.languageservice;
 import mcppide.scan;
+import mcpplibs.mtest.manifest;
 import mcppide.testing;
 import mcpplibs.os;
 
@@ -33,7 +34,7 @@ export namespace mcppide::server {
 
 using Json = nlohmann::json;
 
-inline constexpr std::string_view kVersion = "1.2.0";
+inline constexpr std::string_view kVersion = "1.2.1";
 // THE SERIES (mcpp design 2026-11-07, D15): `X.Y` of `X.Y.Z`, shared by the backend and every editor
 // plugin; components of one series work together, and `Z` is each component's own patch. A plugin
 // refuses a backend of another series, naming both versions.
@@ -1470,6 +1471,18 @@ std::optional<std::string> test_name_of(const std::filesystem::path& root, const
     return below.generic_string();
 }
 
+// The suite types the project's tests declare (`class Fixture : public CTS` in a module beside them),
+// read across the files of tests/ as mtest's static manifest reads them.
+mcpplibs::mtest::manifest::suite_types test_suite_types(const std::filesystem::path& root) {
+    static const std::set<std::string> cxx{".cpp", ".cc", ".cxx", ".cppm", ".ixx", ".mpp"};
+    std::vector<std::string> sources;
+    std::error_code ec;
+    for (std::filesystem::recursive_directory_iterator it(root / "tests", ec), end; !ec && it != end; it.increment(ec))
+        if (it->is_regular_file(ec) && cxx.contains(it->path().extension().string()))
+            sources.push_back(read_text(it->path()));
+    return mcpplibs::mtest::manifest::types_of(sources);
+}
+
 // The source of a test by its name: tests/<name>.cpp (or .cc, .cxx).
 std::filesystem::path test_source(const std::filesystem::path& root, std::string_view name) {
     for (const auto* ext : {".cpp", ".cc", ".cxx"}) {
@@ -1492,7 +1505,7 @@ std::expected<Json, rpc::Error> Session::source_entries(const Json& p) {
     if (!proj) return Json{{"file", file.generic_string()}, {"kind", "none"}};
     const auto text = p.contains("text") && p["text"].is_string() ? p["text"].get<std::string>() : read_text(file);
     const auto extra = test_macros();
-    const auto found = scan::scan(text, testing::macros(extra));
+    const auto found = scan::scan(text, testing::macros(extra), test_suite_types(proj->root));
     Json out{{"file", file.generic_string()}, {"root", proj->root.generic_string()}, {"kind", "none"}};
     if (auto name = test_name_of(proj->root, file)) {
         out["kind"] = "test";
@@ -1520,7 +1533,7 @@ std::expected<Json, rpc::Error> Session::test_cases(const Json& p) {
     Json out{{"root", root.generic_string()}, {"test", test}, {"file", file.generic_string()}, {"framework", nullptr}, {"cases", Json::array()}};
     if (file.empty()) return out;
     const auto extra = test_macros();
-    const auto found = scan::scan(read_text(file), testing::macros(extra));
+    const auto found = scan::scan(read_text(file), testing::macros(extra), test_suite_types(root));
     if (found.mainLine) out["main"] = Json{{"line", *found.mainLine}, {"approximate", true}};
     bool trusted;
     {
diff --git a/tests/test_testing.cpp b/tests/test_testing.cpp
index e23ae4d..9ff6898 100644
--- a/tests/test_testing.cpp
+++ b/tests/test_testing.cpp
@@ -7,6 +7,7 @@ import std;
 import mcppide.testsupport;
 import nlohmann.json;
 import mcppide.scan;
+import mcpplibs.mtest.manifest;
 import mcppide.testing;
 import mcppide.rpc;
 import mcppide.server;
@@ -149,31 +150,30 @@ TEST(Math,
         check(testing::case_outputs(fw("catch2"), "[ RUN      ] x\n").empty());
     }
 
-    // mtest's cases: `"name"_test` literals, prefixed by the suites they are declared in; never a
-    // literal in a comment or one not followed by `_test`. The framework is claimed by its package
-    // and its cases, and a record of `mcpp test` lists and reports them (the test protocol).
+    // mtest's cases as mtest's static manifest reads them: each object (`UTest`, `Suite`, ...) is a
+    // case, and so is each `"name"_test` declared in one, under its name; never a literal in a
+    // comment or one not followed by `_test`. The framework is claimed by its package and its
+    // cases, and a record of `mcpp test` lists and reports them (the test protocol).
     {
         const auto r = scan::scan(R"(import mcpplibs.mtest;
 using namespace mcpplibs::mtest;
 // "commented"_test
-suite parsing{"parsing", [] {
-    "an empty line"_test = [] { expect(true); };
-    suite fields{"fields", [] {
-        "one field"_test[tag{"x"}] = [] {};
-    }};
+UTest empty{"an empty line", [] { expect(true); }};
+Suite parsing{"parsing", tag{"p"}, [] {
+    "one field"_test[tag{"x"}] = [] {};
     const char* s = "not a case";
 }};
-mcpplibs::mtest::suite other{"other", [] { "after"_test = [] {}; }};
+mcpplibs::mtest::E2E other{"other", [] { "after"_test = [] {}; }};
 int main() { "top"_test = [] {}; return report(); }
 )", {});
-        check(r.cases.size() == 4);
-        check(r.cases.size() == 4 && r.cases[0].id == "parsing/an empty line" && r.cases[0].line == 4);
-        check(r.cases.size() == 4 && r.cases[1].id == "parsing/fields/one field");
-        check(r.cases.size() == 4 && r.cases[2].id == "other/after" && r.cases[3].id == "top");
+        std::vector<std::string> ids;
+        for (const auto& c : r.cases) ids.push_back(c.id);
+        check(ids == std::vector<std::string>{"an empty line", "parsing", "parsing/one field", "other", "other/after", "top"});
+        check(r.cases.size() == 6 && r.cases[0].line == 3 && r.cases[2].line == 5);
         check(testing::framework_of({"app", "mcpplibs.mtest"}, r, Json::object()) == &fw("mtest"));
         check(testing::framework_of({"app"}, r, Json::object()) == nullptr);
         const auto cases = testing::static_cases(fw("mtest"), r, Json::object());
-        check(cases.size() == 4 && cases[0].name == "parsing/an empty line" && cases[0].line == 4);
+        check(cases.size() == 6 && cases[0].name == "an empty line" && cases[0].line == 3);
 
         const auto record = Json::parse(R"({"test":"parse","protocol":1,
             "listed":[{"id":"parsing/an empty line","file":"tests/parse.cpp","line":5}],
@@ -192,6 +192,19 @@ int main() { "top"_test = [] {}; return report(); }
         check(outcomes.size() == 4 && outcomes[3].outcome.status == "passed");
     }
 
+    // A suite type the project's tests declare in a module beside them is a suite type in every
+    // file that uses it: the server reads the types across tests/ before it scans a file.
+    {
+        const std::vector<std::string> sources{
+            "export module cts;\nimport mcpplibs.mtest;\nexport class Fixture : public mcpplibs::mtest::CTS {\n"
+            "public:\n    using CTS::CTS;\n};\n"};
+        const auto types = mcpplibs::mtest::manifest::types_of(sources);
+        const std::string_view cases = "import cts;\nFixture one{\"one\"};\nFixture two{\"two@warm\"};\n";
+        const auto r = scan::scan(cases, {}, types);
+        check(r.cases.size() == 2 && r.cases[0].id == "one" && r.cases[1].id == "two@warm" && r.cases[1].line == 2);
+        check(scan::scan(cases, {}).cases.empty());
+    }
+
     // source/entries and test/cases over a project on disk (no mcpp: the plan's packages are not
     // known, so no framework is claimed, and the static entries still answer).
     {