diff --git a/dist/index.js b/dist/index.js
index b0f6516..31f2cf0 100644
--- a/dist/index.js
+++ b/dist/index.js
@@ -937,7 +937,8 @@ class DotnetTrxParser {
         }
     }
     getTestClasses(trx) {
-        if (trx.TestRun.TestDefinitions === undefined || trx.TestRun.Results === undefined) {
+        if (trx.TestRun.TestDefinitions === undefined || trx.TestRun.Results === undefined ||
+            !trx.TestRun.TestDefinitions.some(td => td.UnitTest && Array.isArray(td.UnitTest))) {
             return [];
         }
         const unitTests = {};
diff --git a/src/parsers/dotnet-trx/dotnet-trx-parser.ts b/src/parsers/dotnet-trx/dotnet-trx-parser.ts
index a81d4a2..3b7acc4 100644
--- a/src/parsers/dotnet-trx/dotnet-trx-parser.ts
+++ b/src/parsers/dotnet-trx/dotnet-trx-parser.ts
@@ -62,7 +62,8 @@ export class DotnetTrxParser implements TestParser {
   }
 
   private getTestClasses(trx: TrxReport): TestClass[] {
-    if (trx.TestRun.TestDefinitions === undefined || trx.TestRun.Results === undefined) {
+    if (trx.TestRun.TestDefinitions === undefined || trx.TestRun.Results === undefined ||
+        !trx.TestRun.TestDefinitions.some(td => td.UnitTest && Array.isArray(td.UnitTest))) {
       return []
     }