diff --git a/CHANGELOG.md b/CHANGELOG.md
index 95e19a0..cd974c2 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -7,6 +7,10 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+## [6.0.3] - 2024-10-25
+### Fixed
+-   Category descriptions and group descriptions were missing when merging into the project root.
+
 ## [6.0.2] - 2024-10-13
 ### Fixed
 -   Category descriptions and group descriptions were missing in the generated documentation when TypeDoc was run
@@ -88,7 +92,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 First release
 
-[unreleased]: https://github.com/krisztianb/typedoc-plugin-merge-modules/compare/v6.0.2...HEAD
+[unreleased]: https://github.com/krisztianb/typedoc-plugin-merge-modules/compare/v6.0.3...HEAD
+[6.0.3]: https://github.com/krisztianb/typedoc-plugin-merge-modules/releases/tag/v6.0.3
 [6.0.2]: https://github.com/krisztianb/typedoc-plugin-merge-modules/releases/tag/v6.0.2
 [6.0.1]: https://github.com/krisztianb/typedoc-plugin-merge-modules/releases/tag/v6.0.1
 [6.0.0]: https://github.com/krisztianb/typedoc-plugin-merge-modules/releases/tag/v6.0.0
diff --git a/package.json b/package.json
index cf03ebc..b2798b9 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
     "name": "typedoc-plugin-merge-modules",
-    "version": "6.0.2",
+    "version": "6.0.3",
     "description": "Plugin for TypeDoc that merges the content of modules.",
     "author": {
         "name": "Krisztián Balla",
diff --git a/src/merger/module_bundle.ts b/src/merger/module_bundle.ts
index 71c1fb0..24182e0 100644
--- a/src/merger/module_bundle.ts
+++ b/src/merger/module_bundle.ts
@@ -1,11 +1,8 @@
-/** @module merger */
 import { Comment, DeclarationReflection, DocumentReflection, ProjectReflection, ReflectionKind } from "typedoc";
 import {
-    addDeclarationReflectionToTarget,
-    addDocumentReflectionToTarget,
     getNameFromDescriptionTag,
-    removeDeclarationReflectionFromModule,
-    removeDocumentReflectionFromModule,
+    moveDeclarationReflectionToTarget,
+    moveDocumentReflectionToTarget,
     removeTagFromCommentsOf,
 } from "../utils";
 
@@ -42,33 +39,37 @@ export class ModuleBundle {
     }
 
     /**
-     * Merges the modules of the bundle into one module.
+     * Merges the modules of the bundle into one module (or the given target override).
      * @param categorizationHasAlreadyHappened Defines if TypeDoc has already categorized the
      *                                         reflections in the modules of the bundle.
+     * @param targetOverride A module to target, taking precendence over the bundle's search.
      */
-    public merge(categorizationHasAlreadyHappened: boolean): void {
+    public merge(
+        categorizationHasAlreadyHappened: boolean,
+        targetOverride?: DeclarationReflection | ProjectReflection,
+    ): void {
         // get target module
-        const targetModule = this.getTargetModule();
-        removeTagFromCommentsOf(targetModule, targetModuleCommentTag);
+        const mergeTarget = targetOverride ?? this.getTargetModule();
+        removeTagFromCommentsOf(mergeTarget, targetModuleCommentTag);
 
-        this.mergeChildrenAndDocumentsIntoTargetModule(targetModule);
+        this.moveChildrenAndDocumentsIntoTarget(mergeTarget);
 
         if (categorizationHasAlreadyHappened) {
             // In this case TypeDoc has already categorized and grouped the reflections.
-            // Therefore we must merge the content all categories and groups into the target module.
-            this.mergeCategoriesIntoTargetModule(targetModule);
-            this.mergeGroupsIntoTargetModule(targetModule);
+            // Therefore we must copy the content of all categories and groups into the target.
+            this.moveCategoriesIntoTarget(mergeTarget);
+            this.moveGroupsIntoTarget(mergeTarget);
         } else {
-            // In this case we must copy the category descriptions into the target module because TypeDoc will look
+            // In this case we must copy the category descriptions into the target because TypeDoc will look
             // for them there when it categorizes and groups the reflections.
-            // If we don't do this then the category and group descriptions would be missing in the docs.
-            this.copyCategoryDescriptionTagsIntoTargetModule(targetModule);
-            this.copyGroupDescriptionTagsIntoTargetModule(targetModule);
+            // If we don't do this then the category and group descriptions will be missing in the docs.
+            this.copyCategoryDescriptionTagsIntoTarget(mergeTarget);
+            this.copyGroupDescriptionTagsIntoTarget(mergeTarget);
         }
 
         // remove rest modules
         this.modules.forEach((module) => {
-            if (module !== targetModule) {
+            if (module !== mergeTarget) {
                 delete module.children;
                 this.project.removeReflection(module);
             }
@@ -101,7 +102,11 @@ export class ModuleBundle {
         return this.modules[0];
     }
 
-    private mergeChildrenAndDocumentsIntoTargetModule(targetModule: DeclarationReflection): void {
+    /**
+     * Moves all children and documents into the given target.
+     * @param target The target into which the children and documents should be moved.
+     */
+    private moveChildrenAndDocumentsIntoTarget(target: DeclarationReflection | ProjectReflection): void {
         for (const mod of this.modules) {
             // Here we create a copy because the next loop modifies the collection
             const reflections = [...(mod.childrenIncludingDocuments ?? [])];
@@ -109,53 +114,27 @@ export class ModuleBundle {
             for (const ref of reflections) {
                 // Drop aliases (= ReflectionKind.Reference)
                 if (ref instanceof DeclarationReflection && !ref.kindOf(ReflectionKind.Reference)) {
-                    this.moveDeclarationReflectionToTargetModule(ref, targetModule);
+                    moveDeclarationReflectionToTarget(ref, target);
                 } else if (ref instanceof DocumentReflection) {
-                    this.moveDocumentReflectionToTargetModule(ref, targetModule);
+                    moveDocumentReflectionToTarget(ref, target);
                 }
             }
         }
     }
 
     /**
-     * Moves a declaration reflection to the given target module.
-     * @param ref The declaration reflection that should be moved.
-     * @param targetModule The target module into which the declaration reflection should be moved.
-     */
-    // eslint-disable-next-line class-methods-use-this
-    private moveDeclarationReflectionToTargetModule(
-        ref: DeclarationReflection,
-        targetModule: DeclarationReflection,
-    ): void {
-        removeDeclarationReflectionFromModule(ref);
-        addDeclarationReflectionToTarget(ref, targetModule);
-    }
-
-    /**
-     * Moves a document reflection to the given target module.
-     * @param ref The document reflection that should be moved.
-     * @param targetModule The target module into which the document reflection should be moved.
-     * @throws {Error} If the given reflection is not within a module.
-     */
-    // eslint-disable-next-line class-methods-use-this
-    private moveDocumentReflectionToTargetModule(ref: DocumentReflection, targetModule: DeclarationReflection): void {
-        removeDocumentReflectionFromModule(ref);
-        addDocumentReflectionToTarget(ref, targetModule);
-    }
-
-    /**
-     * Merges the children from all modules' categories into the corresponding category of the given target module.
-     * @param targetModule The target module into whoes categories the children should be merged.
+     * Moves the children from all modules' categories into the corresponding category of the given target.
+     * @param target The target into whose categories the children should be moved.
      */
-    private mergeCategoriesIntoTargetModule(targetModule: DeclarationReflection): void {
-        // merge categories
+    private moveCategoriesIntoTarget(target: DeclarationReflection | ProjectReflection): void {
+        // move categories
         this.modules.forEach((module) => {
-            if (module !== targetModule) {
+            if (module !== target) {
                 module.categories?.forEach((category) => {
-                    const existingTargetCategory = targetModule.categories?.find((c) => c.title === category.title);
+                    const existingTargetCategory = target.categories?.find((c) => c.title === category.title);
 
                     if (!existingTargetCategory) {
-                        targetModule.categories = [...(targetModule.categories ?? []), category];
+                        target.categories = [...(target.categories ?? []), category];
                     } else {
                         existingTargetCategory.children = existingTargetCategory.children.concat(category.children);
 
@@ -168,7 +147,7 @@ export class ModuleBundle {
         });
 
         // sort categories
-        targetModule.categories?.forEach((category) => {
+        target.categories?.forEach((category) => {
             category.children.sort((a, b) => {
                 if (a.name > b.name) {
                     return 1;
@@ -180,12 +159,12 @@ export class ModuleBundle {
         });
     }
     /**
-     * Copies the category description comment tags into the the given target module.
-     * @param targetModule The target module into which the category descriptions are merged.
+     * Copies the category description comment tags into the the given target.
+     * @param target The target into which the category descriptions are copied.
      */
-    private copyCategoryDescriptionTagsIntoTargetModule(targetModule: DeclarationReflection): void {
+    private copyCategoryDescriptionTagsIntoTarget(target: DeclarationReflection | ProjectReflection): void {
         this.modules.forEach((module) => {
-            if (module !== targetModule) {
+            if (module !== target) {
                 const categoryDescriptionsOfModule =
                     module.comment?.blockTags.filter((bt) => bt.tag === "@categoryDescription") ?? [];
 
@@ -193,19 +172,19 @@ export class ModuleBundle {
                     return; // nothing to copy
                 }
 
-                if (!targetModule.comment) {
-                    targetModule.comment = new Comment([], []);
+                if (!target.comment) {
+                    target.comment = new Comment([], []);
                 }
 
                 categoryDescriptionsOfModule.forEach((categoryDescription) => {
-                    const targetModuleAlreadyHasThisCategoryDescriptionsTag = targetModule.comment?.blockTags.find(
+                    const targetModuleAlreadyHasThisCategoryDescriptionsTag = target.comment?.blockTags.find(
                         (bt) =>
                             bt.tag === "@categoryDescription" &&
                             getNameFromDescriptionTag(bt) === getNameFromDescriptionTag(categoryDescription),
                     );
 
                     if (!targetModuleAlreadyHasThisCategoryDescriptionsTag) {
-                        targetModule.comment?.blockTags.push(categoryDescription);
+                        target.comment?.blockTags.push(categoryDescription);
                     }
                 });
             }
@@ -213,18 +192,18 @@ export class ModuleBundle {
     }
 
     /**
-     * Merges the children from all modules' groups into the corresponding group of the given target module.
-     * @param targetModule The target module into whoes groups the children should be merged.
+     * Moves the children from all modules' groups into the corresponding group of the given target.
+     * @param target The target into whose groups the children should be moved.
      */
-    private mergeGroupsIntoTargetModule(targetModule: DeclarationReflection): void {
-        // merge groups
+    private moveGroupsIntoTarget(target: DeclarationReflection | ProjectReflection): void {
+        // move groups
         this.modules.forEach((module) => {
-            if (module !== targetModule) {
+            if (module !== target) {
                 module.groups?.forEach((group) => {
-                    const existingTargetGroup = targetModule.groups?.find((g) => g.title === group.title);
+                    const existingTargetGroup = target.groups?.find((g) => g.title === group.title);
 
                     if (!existingTargetGroup) {
-                        targetModule.groups = [...(targetModule.groups ?? []), group];
+                        target.groups = [...(target.groups ?? []), group];
                     } else {
                         existingTargetGroup.children = existingTargetGroup.children.concat(group.children);
 
@@ -237,7 +216,7 @@ export class ModuleBundle {
         });
 
         // sort groups
-        targetModule.groups?.forEach((group) => {
+        target.groups?.forEach((group) => {
             group.children.sort((a, b) => {
                 if (a.name > b.name) {
                     return 1;
@@ -250,12 +229,12 @@ export class ModuleBundle {
     }
 
     /**
-     * Copies the group description comment tags into the the given target module.
-     * @param targetModule The target module into which the group descriptions are merged.
+     * Copies the group description comment tags into the the given target.
+     * @param target The target into which the group descriptions are copied.
      */
-    private copyGroupDescriptionTagsIntoTargetModule(targetModule: DeclarationReflection): void {
+    private copyGroupDescriptionTagsIntoTarget(target: DeclarationReflection | ProjectReflection): void {
         this.modules.forEach((module) => {
-            if (module !== targetModule) {
+            if (module !== target) {
                 const groupDescriptionsOfModule =
                     module.comment?.blockTags.filter((bt) => bt.tag === "@groupDescription") ?? [];
 
@@ -263,19 +242,19 @@ export class ModuleBundle {
                     return; // nothing to copy
                 }
 
-                if (!targetModule.comment) {
-                    targetModule.comment = new Comment([], []);
+                if (!target.comment) {
+                    target.comment = new Comment([], []);
                 }
 
                 groupDescriptionsOfModule.forEach((groupDescription) => {
-                    const targetModuleAlreadyHasThisGroupDescriptionsTag = targetModule.comment?.blockTags.find(
+                    const targetModuleAlreadyHasThisGroupDescriptionsTag = target.comment?.blockTags.find(
                         (bt) =>
                             bt.tag === "@groupDescription" &&
                             getNameFromDescriptionTag(bt) === getNameFromDescriptionTag(groupDescription),
                     );
 
                     if (!targetModuleAlreadyHasThisGroupDescriptionsTag) {
-                        targetModule.comment?.blockTags.push(groupDescription);
+                        target.comment?.blockTags.push(groupDescription);
                     }
                 });
             }
diff --git a/src/merger/module_category_merger.ts b/src/merger/module_category_merger.ts
index d7960c6..3ea3893 100644
--- a/src/merger/module_category_merger.ts
+++ b/src/merger/module_category_merger.ts
@@ -1,4 +1,3 @@
-/** @module merger */
 import { DeclarationReflection } from "typedoc";
 import { ModuleMerger } from "./module_merger";
 
diff --git a/src/merger/project_merger.ts b/src/merger/project_merger.ts
index 9557a3c..31c3e0d 100644
--- a/src/merger/project_merger.ts
+++ b/src/merger/project_merger.ts
@@ -1,11 +1,7 @@
-import { DeclarationReflection, DocumentReflection, ProjectReflection, ReflectionKind } from "typedoc";
-import {
-    addDeclarationReflectionToTarget,
-    addDocumentReflectionToTarget,
-    getModulesFrom,
-    removeDeclarationReflectionFromModule,
-    removeDocumentReflectionFromModule,
-} from "../utils";
+import { ProjectReflection } from "typedoc";
+import { Plugin } from "../plugin";
+import { getModulesFrom } from "../utils";
+import { ModuleBundle } from "./module_bundle";
 
 /**
  * Merger that moves the content of all modules into the project root.
@@ -14,12 +10,17 @@ export class ProjectMerger {
     /** The project whose modules are merged. */
     private readonly project: ProjectReflection;
 
+    /** The plugin which is using this merger. */
+    private readonly plugin: Plugin;
+
     /**
      * Creates a new merger instance.
      * @param project The project whose modules are merged.
+     * @param plugin The plugin which is using this merger.
      */
-    public constructor(project: ProjectReflection) {
+    public constructor(project: ProjectReflection, plugin: Plugin) {
         this.project = project;
+        this.plugin = plugin;
     }
 
     /**
@@ -29,56 +30,11 @@ export class ProjectMerger {
         // In monorepo project each project is also a module => Recursively collect all modules
         const allModules = getModulesFrom(this.project);
 
-        if (allModules.length > 0) {
-            this.removeModulesFromProject();
-
-            for (const module of allModules) {
-                // Here we create a copy because the next loop modifies the collection
-                const reflections = [...(module.childrenIncludingDocuments ?? [])];
-
-                for (const ref of reflections) {
-                    // Drop aliases (= ReflectionKind.Reference) and modules
-                    if (
-                        ref instanceof DeclarationReflection &&
-                        !ref.kindOf([ReflectionKind.Reference, ReflectionKind.Module])
-                    ) {
-                        this.moveDeclarationReflectionToProject(ref);
-                    } else if (ref instanceof DocumentReflection) {
-                        this.moveDocumentReflectionFromToProject(ref);
-                    }
-                }
-            }
-        }
-    }
-
-    /**
-     * Removes all modules from the project reflection. Doesn't touch the project documents.
-     */
-    private removeModulesFromProject(): void {
-        this.project.children = [];
-        this.project.children.forEach((child) => this.project.removeReflection(child));
+        // Create a module bundle for all the modules
+        const bundle = new ModuleBundle(this.project);
+        allModules.forEach((module) => bundle.add(module));
 
-        // keep project documents that are included with the TypeDoc config parameter "projectDocuments"
-        this.project.childrenIncludingDocuments =
-            this.project.childrenIncludingDocuments?.filter((item) => item instanceof DocumentReflection) ?? [];
-    }
-
-    /**
-     * Moves a declaration reflection to the project root.
-     * @param ref The declaration reflection that should be moved.
-     */
-    private moveDeclarationReflectionToProject(ref: DeclarationReflection): void {
-        removeDeclarationReflectionFromModule(ref);
-        addDeclarationReflectionToTarget(ref, this.project);
-    }
-
-    /**
-     * Moves a document reflection to the project root.
-     * @param ref The document reflection that should be moved.
-     * @throws {Error} If the given reflection is not within a module.
-     */
-    private moveDocumentReflectionFromToProject(ref: DocumentReflection): void {
-        removeDocumentReflectionFromModule(ref);
-        addDocumentReflectionToTarget(ref, this.project);
+        // Merge the bundle into the project
+        bundle.merge(this.plugin.runsAfterCategorization, this.project);
     }
 }
diff --git a/src/plugin.ts b/src/plugin.ts
index b63ac79..4f5a27c 100644
--- a/src/plugin.ts
+++ b/src/plugin.ts
@@ -144,7 +144,7 @@ export class Plugin {
      */
     private createMerger(project: ProjectReflection): ProjectMerger | ModuleMerger | undefined {
         if (this._options.mode === "project") {
-            return new ProjectMerger(project);
+            return new ProjectMerger(project, this);
         } else if (this._options.mode === "module") {
             return new ModuleMerger(project, this);
         } else if (this._options.mode === "module-category") {
diff --git a/src/utils.ts b/src/utils.ts
index 3af0588..69e70ca 100644
--- a/src/utils.ts
+++ b/src/utils.ts
@@ -50,7 +50,10 @@ export function tryGetOriginalReflectionName(
  * @param reflection The reflection from which the tag should be removed.
  * @param tagToRemove Name of the tag to be removed.
  */
-export function removeTagFromCommentsOf(reflection: DeclarationReflection, tagToRemove: string): void {
+export function removeTagFromCommentsOf(
+    reflection: DeclarationReflection | ProjectReflection,
+    tagToRemove: string,
+): void {
     const tagIndex = reflection.comment?.blockTags.findIndex((ct) => ct.tag === tagToRemove) ?? -1;
 
     if (tagIndex !== -1) {
@@ -132,6 +135,32 @@ export function removeDocumentReflectionFromModule(ref: DocumentReflection): voi
     }
 }
 
+/**
+ * Moves a declaration reflection to the given target.
+ * @param ref The declaration reflection that should be moved.
+ * @param target The target into which the declaration reflection should be moved.
+ */
+export function moveDeclarationReflectionToTarget(
+    ref: DeclarationReflection,
+    target: DeclarationReflection | ProjectReflection,
+): void {
+    removeDeclarationReflectionFromModule(ref);
+    addDeclarationReflectionToTarget(ref, target);
+}
+
+/**
+ * Moves a document reflection to the given target.
+ * @param ref The document reflection that should be moved.
+ * @param target The target into which the document reflection should be moved.
+ */
+export function moveDocumentReflectionToTarget(
+    ref: DocumentReflection,
+    target: DeclarationReflection | ProjectReflection,
+): void {
+    removeDocumentReflectionFromModule(ref);
+    addDocumentReflectionToTarget(ref, target);
+}
+
 /**
  * Returns the modules within the given module parent. Searches recursively.
  * @param moduleParent The element in which to search for modules.
diff --git a/test/merge-project-monorepo/input/project1/a.ts b/test/merge-project-monorepo/input/project1/a.ts
index 1e14df5..98936de 100644
--- a/test/merge-project-monorepo/input/project1/a.ts
+++ b/test/merge-project-monorepo/input/project1/a.ts
@@ -1 +1,2 @@
+/** @category Alpha */
 export class A {}
diff --git a/test/merge-project-monorepo/input/project1/b.ts b/test/merge-project-monorepo/input/project1/b.ts
index 1aa41a5..5b379cf 100644
--- a/test/merge-project-monorepo/input/project1/b.ts
+++ b/test/merge-project-monorepo/input/project1/b.ts
@@ -1 +1,2 @@
+/** @category Beta */
 export class B {}
diff --git a/test/merge-project-monorepo/input/project1/index.ts b/test/merge-project-monorepo/input/project1/index.ts
index bfd87cc..8f43144 100644
--- a/test/merge-project-monorepo/input/project1/index.ts
+++ b/test/merge-project-monorepo/input/project1/index.ts
@@ -1,2 +1,9 @@
+/**
+ * @module
+ * @categoryDescription Alpha
+ * Category description from the file of A.
+ * @categoryDescription Beta
+ * Category description from the file of B.
+ */
 export { A } from "./a";
 export { B } from "./b";
diff --git a/test/merge-project-monorepo/input/project2/c.ts b/test/merge-project-monorepo/input/project2/c.ts
index 1ec0ebf..baead1c 100644
--- a/test/merge-project-monorepo/input/project2/c.ts
+++ b/test/merge-project-monorepo/input/project2/c.ts
@@ -1 +1,2 @@
+/** @category Gamma */
 export class C {}
diff --git a/test/merge-project-monorepo/input/project2/index.ts b/test/merge-project-monorepo/input/project2/index.ts
index 5e7c6a6..c730208 100644
--- a/test/merge-project-monorepo/input/project2/index.ts
+++ b/test/merge-project-monorepo/input/project2/index.ts
@@ -1 +1,6 @@
+/**
+ * @module
+ * @categoryDescription Gamma
+ * Category description from the file of C.
+ */
 export { C } from "./c";
diff --git a/test/merge-project-monorepo/test.cy.ts b/test/merge-project-monorepo/test.cy.ts
index bd314dc..47318e1 100644
--- a/test/merge-project-monorepo/test.cy.ts
+++ b/test/merge-project-monorepo/test.cy.ts
@@ -21,3 +21,30 @@ describe("index.html", () => {
         cy.get("nav").find("a[href='./documents/doc2.html']");
     });
 });
+
+describe("modules.html", () => {
+    beforeEach(() => {
+        cy.visit("./merge-project-monorepo/output/modules.html");
+    });
+
+    it("contains the category Alpha and its description", () => {
+        const sectionSelector = ".col-content .tsd-index-section:nth-of-type(1)";
+
+        cy.get(sectionSelector + " h3").should("have.text", "Alpha");
+        cy.get(sectionSelector + " p").should("have.text", "Category description from the file of A.");
+    });
+
+    it("contains the category Beta and its description", () => {
+        const sectionSelector = ".col-content .tsd-index-section:nth-of-type(2)";
+
+        cy.get(sectionSelector + " h3").should("have.text", "Beta");
+        cy.get(sectionSelector + " p").should("have.text", "Category description from the file of B.");
+    });
+
+    it("contains the category Gamma and its description", () => {
+        const sectionSelector = ".col-content .tsd-index-section:nth-of-type(3)";
+
+        cy.get(sectionSelector + " h3").should("have.text", "Gamma");
+        cy.get(sectionSelector + " p").should("have.text", "Category description from the file of C.");
+    });
+});
diff --git a/test/merge-project/input/a.ts b/test/merge-project/input/a.ts
index 1e14df5..21a9b2b 100644
--- a/test/merge-project/input/a.ts
+++ b/test/merge-project/input/a.ts
@@ -1 +1,8 @@
+/**
+ * @module
+ * @categoryDescription Alpha
+ * Category description from the file of A.
+ */
+
+/** @category Alpha */
 export class A {}
diff --git a/test/merge-project/input/b.ts b/test/merge-project/input/b.ts
index 1aa41a5..24fc95e 100644
--- a/test/merge-project/input/b.ts
+++ b/test/merge-project/input/b.ts
@@ -1 +1,8 @@
+/**
+ * @module
+ * @categoryDescription Beta
+ * Category description from the file of B.
+ */
+
+/** @category Beta  */
 export class B {}
diff --git a/test/merge-project/input/c.ts b/test/merge-project/input/c.ts
index 1ec0ebf..e386ebf 100644
--- a/test/merge-project/input/c.ts
+++ b/test/merge-project/input/c.ts
@@ -1 +1,8 @@
+/**
+ * @module
+ * @categoryDescription Gamma
+ * Category description from the file of C.
+ */
+
+/** @category Gamma  */
 export class C {}
diff --git a/test/merge-project/test.cy.ts b/test/merge-project/test.cy.ts
index 23fcdba..68349ef 100644
--- a/test/merge-project/test.cy.ts
+++ b/test/merge-project/test.cy.ts
@@ -20,3 +20,30 @@ describe("index.html", () => {
         cy.get("nav").find("a[href='./documents/doc1.html']");
     });
 });
+
+describe("modules.html", () => {
+    beforeEach(() => {
+        cy.visit("./merge-project/output/modules.html");
+    });
+
+    it("contains the category Alpha and its description", () => {
+        const sectionSelector = ".col-content .tsd-index-section:nth-of-type(1)";
+
+        cy.get(sectionSelector + " h3").should("have.text", "Alpha");
+        cy.get(sectionSelector + " p").should("have.text", "Category description from the file of A.");
+    });
+
+    it("contains the category Beta and its description", () => {
+        const sectionSelector = ".col-content .tsd-index-section:nth-of-type(2)";
+
+        cy.get(sectionSelector + " h3").should("have.text", "Beta");
+        cy.get(sectionSelector + " p").should("have.text", "Category description from the file of B.");
+    });
+
+    it("contains the category Gamma and its description", () => {
+        const sectionSelector = ".col-content .tsd-index-section:nth-of-type(3)";
+
+        cy.get(sectionSelector + " h3").should("have.text", "Gamma");
+        cy.get(sectionSelector + " p").should("have.text", "Category description from the file of C.");
+    });
+});