diff --git a/__tests__/dotnet-trx.test.ts b/__tests__/dotnet-trx.test.ts
index c10b997..ba225c4 100644
--- a/__tests__/dotnet-trx.test.ts
+++ b/__tests__/dotnet-trx.test.ts
@@ -65,7 +65,8 @@ describe('dotnet-trx tests', () => {
       listTests: 'failed',
       onlySummary: false,
       slugPrefix: '',
-      baseUrl: ''
+      baseUrl: '',
+      stackTraceInSummary: false
     }
     const report = getReport([result], reportOptions)
     fs.mkdirSync(path.dirname(outputPath), {recursive: true})
diff --git a/src/main.ts b/src/main.ts
index 732d839..4d81413 100644
--- a/src/main.ts
+++ b/src/main.ts
@@ -54,6 +54,7 @@ class TestReporter {
   readonly workDirInput = core.getInput('working-directory', {required: false})
   readonly onlySummary = core.getInput('only-summary', {required: false}) === 'true'
   readonly outputTo = core.getInput('output-to', {required: false})
+  readonly stackTraceInSummary = this.outputTo === 'step-summary' ? true : false
   readonly token = core.getInput('token', {required: true})
   readonly slugPrefix: string = ''
   readonly octokit: InstanceType<typeof GitHub>
@@ -205,8 +206,8 @@ class TestReporter {
     }
 
     core.info('Creating report summary')
-    const {listSuites, listTests, onlySummary, slugPrefix} = this
-    const summary = getReport(results, {listSuites, listTests, baseUrl, slugPrefix, onlySummary})
+    const {listSuites, listTests, onlySummary, slugPrefix, stackTraceInSummary} = this
+    const summary = getReport(results, {listSuites, listTests, baseUrl, slugPrefix, onlySummary, stackTraceInSummary})
 
     core.info('Creating annotations')
     const annotations = getAnnotations(results, this.maxAnnotations)
diff --git a/src/report/get-report.ts b/src/report/get-report.ts
index fb90f01..d38506c 100644
--- a/src/report/get-report.ts
+++ b/src/report/get-report.ts
@@ -12,6 +12,7 @@ export interface ReportOptions {
   slugPrefix: string
   baseUrl: string
   onlySummary: boolean
+  stackTraceInSummary: boolean
 }
 
 const defaultOptions: ReportOptions = {
@@ -19,7 +20,8 @@ const defaultOptions: ReportOptions = {
   listTests: 'all',
   slugPrefix: '',
   baseUrl: '',
-  onlySummary: false
+  onlySummary: false,
+  stackTraceInSummary: false
 }
 
 export function getReport(results: TestRunResult[], options: ReportOptions = defaultOptions): string {
@@ -239,9 +241,13 @@ function getTestsReport(ts: TestSuiteResult, runIndex: number, suiteIndex: numbe
       const result = getResultIcon(tc.result)
       sections.push(`${space}${result} ${tc.name}`)
       if (tc.error) {
-        const lines = (tc.error.message ?? getFirstNonEmptyLine(tc.error.details)?.trim())
-          ?.split(/\r?\n/g)
-          .map(l => '\t' + l)
+        let errorData = ''
+        if (options.stackTraceInSummary) {
+          errorData = tc.error.details ?? ''
+        } else {
+          errorData = tc.error.message ?? getFirstNonEmptyLine(tc.error.details)?.trim() ?? ''
+        }
+        const lines = errorData.split(/\r?\n/g).map(l => '\t' + l)
         if (lines) {
           sections.push(...lines)
         }