diff --git a/src/service/transformer/declaration-bundler/util/get-type-reference-module-from-file-name.ts b/src/service/transformer/declaration-bundler/util/get-type-reference-module-from-file-name.ts
index 722a8c8..5f77cc5 100644
--- a/src/service/transformer/declaration-bundler/util/get-type-reference-module-from-file-name.ts
+++ b/src/service/transformer/declaration-bundler/util/get-type-reference-module-from-file-name.ts
@@ -14,8 +14,10 @@ export interface TypeReference {
 
 export function getTypeReferenceModuleFromFileName({host, fileName}: GetTypeReferenceModuleFromFileNameOptions): TypeReference | undefined {
 	for (const typeRoot of host.getTypeRoots()) {
-		if (!fileName.includes(typeRoot)) continue;
-		const base = path.normalize(fileName.slice(typeRoot.length + 1));
+		const typeRootIndex = fileName.indexOf(typeRoot);
+		if (typeRootIndex < 0) continue;
+
+		const base = path.normalize(fileName.slice(typeRootIndex + typeRoot.length + 1));
 		const moduleSpecifier = base.includes("/") ? base.slice(0, base.indexOf("/")) : base;
 
 		if (typeModuleReferenceIsAllowed({host, moduleSpecifier})) {
diff --git a/test/util/test-runner.ts b/test/util/test-runner.ts
index ef1a8e5..ab3cb57 100644
--- a/test/util/test-runner.ts
+++ b/test/util/test-runner.ts
@@ -80,14 +80,12 @@ for (const [specifier, range] of Object.entries(devDependencies)) {
 
 if (TS_OPTIONS_ENTRIES.size === 0) {
 	throw new Error(`The TS_VERSION environment variable matches none of the available TypeScript versions.
-Filter: ${process.env.TS_VERSION}
-Available TypeScript versions: ${[...TS_OPTIONS_ENTRIES.keys()].join(", ")}`);
+Filter: ${process.env.TS_VERSION}`);
 }
 
 if (ROLLUP_OPTIONS_ENTRIES.size === 0) {
 	throw new Error(`The ROLLUP_VERSION environment variable matches none of the available Rollup versions.
-Filter: ${process.env.ROLLUP_VERSION}
-Available Rollup versions: ${[...ROLLUP_OPTIONS_ENTRIES.keys()].join(", ")}`);
+Filter: ${process.env.ROLLUP_VERSION}`);
 }
 
 interface TestRunOptions {