diff --git a/lib/index.ts b/lib/index.ts
index 2ce3763..32bb94a 100644
--- a/lib/index.ts
+++ b/lib/index.ts
@@ -51,6 +51,13 @@ export interface PluginMetadata {
   // TODO(BST-542): remove, DepRoot.targetFile to be used instead
   // Note: can be missing, see targetFileFilteredForCompatibility
   targetFile?: string;
+
+  // Plugin-specific metadata
+  meta?: {
+    // If we don't return the results for all dependency roots (subprojects),
+    // still record their names to warn the user about them not being scanned
+    allDepRootNames?: string[];
+  };
 }
 
 export interface DepDict {
@@ -90,7 +97,7 @@ export async function inspect(root, targetFile, options?: SingleRootInspectOptio
   if (subProject) {
     subProject = subProject.trim();
   }
-  const plugin = {
+  const plugin: PluginMetadata = {
     name: 'bundled:gradle',
     runtime: 'unknown',
     targetFile: targetFileFilteredForCompatibility(targetFile),
@@ -104,9 +111,14 @@ export async function inspect(root, targetFile, options?: SingleRootInspectOptio
       depRoots: await getAllDepsAllProjects(root, targetFile, options),
     };
   }
+  const depTreeAndDepRootNames = await getAllDepsOneProject(root, targetFile, options, subProject);
+  if (depTreeAndDepRootNames.allDepRootNames) {
+    plugin.meta = plugin.meta || {};
+    plugin.meta.allDepRootNames = depTreeAndDepRootNames.allDepRootNames;
+  }
   return {
     plugin,
-    package: await getAllDepsOneProject(root, targetFile, options, subProject),
+    package: depTreeAndDepRootNames.depTree,
   };
 }
 
@@ -150,23 +162,31 @@ function extractJsonFromScriptOutput(stdoutText: string): JsonDepsScriptResult {
   return JSON.parse(jsonLine!);
 }
 
-async function getAllDepsOneProject(root, targetFile, options, subProject): Promise<DepTree> {
+async function getAllDepsOneProject(root, targetFile, options, subProject):
+    Promise<{depTree: DepTree, allDepRootNames: string[]}> {
   const packageName = path.basename(root);
   const allProjectDeps = await getAllDeps(root, targetFile, options);
+  const allDepRootNames = Object.keys(allProjectDeps.projects);
   let depDict = {} as DepDict;
   if (subProject) {
-    return getDepsSubProject(root, subProject, allProjectDeps);
+    return {
+      depTree: getDepsSubProject(root, subProject, allProjectDeps),
+      allDepRootNames,
+    };
   }
 
   depDict = allProjectDeps.projects[allProjectDeps.defaultProject].depDict;
 
   return {
-    dependencies: depDict,
-    name: packageName,
-    // TODO: extract from project
-    // https://snyksec.atlassian.net/browse/BST-558
-    version: '0.0.0',
-    packageFormatVersion,
+    depTree: {
+      dependencies: depDict,
+      name: packageName,
+      // TODO: extract from project
+      // https://snyksec.atlassian.net/browse/BST-558
+      version: '0.0.0',
+      packageFormatVersion,
+    },
+    allDepRootNames,
   };
 }
 
diff --git a/test/system/multi-module.test.ts b/test/system/multi-module.test.ts
index 76d9aa2..19ebe13 100644
--- a/test/system/multi-module.test.ts
+++ b/test/system/multi-module.test.ts
@@ -8,6 +8,7 @@ test('multi-project, explicitly targeting a subproject build file', async (t) =>
     path.join(fixtureDir('multi-project'), 'subproj', 'build.gradle'));
   t.equals(result.package.name, '.',
     'root project is "."');
+  t.deepEqual(result.plugin.meta!.allDepRootNames, ['subproj']);
 
   t.equal(result.package
     .dependencies!['com.android.tools.build:builder']
@@ -25,6 +26,7 @@ test('multi-project, ran from root, targeting subproj', async (t) => {
     'subproj/build.gradle');
   t.equals(result.package.name, 'multi-project',
     'root project is "multi-project"');
+  t.deepEqual(result.plugin.meta!.allDepRootNames, ['subproj']);
 
   t.equal(result.package
     .dependencies!['com.android.tools.build:builder']
@@ -42,6 +44,7 @@ test('multi-project, ran from a subproject directory', async (t) => {
     'build.gradle');
   t.equals(result.package.name, 'subproj',
     'root project is "subproj"');
+  t.deepEqual(result.plugin.meta!.allDepRootNames, ['subproj']);
 
   t.equal(result.package
     .dependencies!['com.android.tools.build:builder']
@@ -62,6 +65,7 @@ test('multi-project: only sub-project has deps and they are returned', async (t)
     options);
   t.match(result.package.name, '/subproj',
     'sub project name is included in the root pkg name');
+  t.deepEqual(result.plugin.meta!.allDepRootNames, ['root-proj', 'subproj']);
 
   t.equal(result.package
     .dependencies!['com.android.tools.build:builder']
@@ -78,6 +82,7 @@ test('multi-project: only sub-project has deps, none returned for main', async (
     path.join(fixtureDir('multi-project'), 'build.gradle'));
   t.match(result.package.name, '.',
     'returned project name is not sub-project');
+    t.deepEqual(result.plugin.meta!.allDepRootNames, ['root-proj', 'subproj']);
   t.notOk(result.package.dependencies);
 });
 
@@ -86,6 +91,7 @@ test('multi-project: using gradle 3.0.0 via wrapper', async (t) => {
     path.join(fixtureDir('multi-project-gradle-3'), 'build.gradle'));
   t.match(result.package.name, '.',
     'returned project name is not sub-project');
+    t.deepEqual(result.plugin.meta!.allDepRootNames, ['root-proj', 'subproj']);
   t.notOk(result.package.dependencies);
 });
 
@@ -103,6 +109,9 @@ test('multi-project: only sub-project has deps and they are returned space needs
   const result = await inspect('.',
     path.join(fixtureDir('multi-project'), 'build.gradle'),
     options);
+
+    t.deepEqual(result.plugin.meta!.allDepRootNames, ['root-proj', 'subproj']);
+
   t.match(result.package.name, '/subproj',
     'sub project name is included in the root pkg name');
 
@@ -161,11 +170,11 @@ test('multi-project: parallel with multiDepRoots produces multiple results with
     names.add(p.depTree.name);
   }
   t.deepEqual(names, new Set<string>([
-    'multi-project-parallel', 
-    'multi-project-parallel/subproj0', 
-    'multi-project-parallel/subproj1', 
-    'multi-project-parallel/subproj2', 
-    'multi-project-parallel/subproj3', 
+    'multi-project-parallel',
+    'multi-project-parallel/subproj0',
+    'multi-project-parallel/subproj1',
+    'multi-project-parallel/subproj2',
+    'multi-project-parallel/subproj3',
     'multi-project-parallel/subproj4']));
 });