diff --git a/src/testRunner/unittests/tsserverProjectSystem.ts b/src/testRunner/unittests/tsserverProjectSystem.ts
index 9f569f46d4d..28d39ccf032 100644
--- a/src/testRunner/unittests/tsserverProjectSystem.ts
+++ b/src/testRunner/unittests/tsserverProjectSystem.ts
@@ -10481,13 +10481,15 @@ declare class TestLib {
                 TestFSWithWatch.getTsBuildProjectFile(project, "index.ts"),
             ];
         }
-        it("does not error on container only project", () => {
-            const project = "container";
-            const containerLib = getProjectFiles("container/lib");
-            const containerExec = getProjectFiles("container/exec");
-            const containerCompositeExec = getProjectFiles("container/compositeExec");
-            const containerConfig = TestFSWithWatch.getTsBuildProjectFile(project, "tsconfig.json");
-            const files = [libFile, ...containerLib, ...containerExec, ...containerCompositeExec, containerConfig];
+
+        const project = "container";
+        const containerLib = getProjectFiles("container/lib");
+        const containerExec = getProjectFiles("container/exec");
+        const containerCompositeExec = getProjectFiles("container/compositeExec");
+        const containerConfig = TestFSWithWatch.getTsBuildProjectFile(project, "tsconfig.json");
+        const files = [libFile, ...containerLib, ...containerExec, ...containerCompositeExec, containerConfig];
+
+        function createHost() {
             const host = createServerHost(files);
 
             // ts build should succeed
@@ -10495,6 +10497,12 @@ declare class TestLib {
             solutionBuilder.buildAllProjects();
             assert.equal(host.getOutput().length, 0);
 
+            return host;
+        }
+
+        it("does not error on container only project", () => {
+            const host = createHost();
+
             // Open external project for the folder
             const session = createSession(host);
             const service = session.getProjectService();
@@ -10521,6 +10529,30 @@ declare class TestLib {
                 assert.deepEqual(semanticDiagnostics, []);
             });
         });
+
+        it("can successfully find references with --out options", () => {
+            const host = createHost();
+            const session = createSession(host);
+            openFilesForSession([containerCompositeExec[1]], session);
+            const service = session.getProjectService();
+            checkNumberOfProjects(service, { configuredProjects: 1 });
+            const locationOfMyConst = protocolLocationFromSubstring(containerCompositeExec[1].content, "myConst");
+            const response = session.executeCommandSeq<protocol.RenameRequest>({
+                command: protocol.CommandTypes.Rename,
+                arguments: {
+                    file: containerCompositeExec[1].path,
+                    ...locationOfMyConst
+               }
+            }).response as protocol.RenameResponseBody;
+
+
+            const myConstLen = "myConst".length;
+            const locationOfMyConstInLib = protocolLocationFromSubstring(containerLib[1].content, "myConst");
+            assert.deepEqual(response.locs, [
+                { file: containerCompositeExec[1].path, locs: [{ start: locationOfMyConst, end: { line: locationOfMyConst.line, offset: locationOfMyConst.offset + myConstLen } }] },
+                { file: containerLib[1].path, locs: [{ start: locationOfMyConstInLib, end: { line: locationOfMyConstInLib.line, offset: locationOfMyConstInLib.offset + myConstLen } }] }
+            ]);
+        });
     });
 
     describe("tsserverProjectSystem duplicate packages", () => {
diff --git a/tests/projects/container/compositeExec/tsconfig.json b/tests/projects/container/compositeExec/tsconfig.json
index f28a9e44eee..4f44b8a562d 100644
--- a/tests/projects/container/compositeExec/tsconfig.json
+++ b/tests/projects/container/compositeExec/tsconfig.json
@@ -1,7 +1,8 @@
 {
     "compilerOptions": {
         "outFile": "../built/local/compositeExec.js",
-        "composite": true
+        "composite": true,
+        "declarationMap": true
     },
     "files": [
         "index.ts"