From ca782ca4f312c253ca23e5bb853fd297472db062 Mon Sep 17 00:00:00 2001
From: Kai Kasprowsky <kai.kasprowsky@sick.de>
Date: Mon, 27 Mar 2023 15:03:17 +0200
Subject: [PATCH] Fix double <system-out> entry in junit.xml

check it system-out already exists
if this is the case append text
---
 10841.improvement.rst   |  1 +
 AUTHORS                 |  1 +
 src/_pytest/junitxml.py | 15 ++++++++++++---
 3 files changed, 14 insertions(+), 3 deletions(-)
 create mode 100644 10841.improvement.rst

diff --git a/10841.improvement.rst b/10841.improvement.rst
new file mode 100644
index 000000000..ca6364c9c
--- /dev/null
+++ b/10841.improvement.rst
@@ -0,0 +1 @@
+only create <system-out> in junit.xml once for each test.
diff --git a/AUTHORS b/AUTHORS
index 058236461..c545520c4 100644
--- a/AUTHORS
+++ b/AUTHORS
@@ -189,6 +189,7 @@ Joshua Bronson
 Jurko Gospodnetić
 Justice Ndou
 Justyna Janczyszyn
+Kai Kasprowsky
 Kale Kundert
 Kamran Ahmad
 Karl O. Pinc
diff --git a/src/_pytest/junitxml.py b/src/_pytest/junitxml.py
index 9242d46d9..8e8e39194 100644
--- a/src/_pytest/junitxml.py
+++ b/src/_pytest/junitxml.py
@@ -186,9 +186,18 @@ class _NodeReporter:
         return "\n".join([header.center(80, "-"), content, ""])
 
     def _write_content(self, report: TestReport, content: str, jheader: str) -> None:
-        tag = ET.Element(jheader)
-        tag.text = bin_xml_escape(content)
-        self.append(tag)
+        exists = False
+        for elem in next(iter(self.xml.node_reporters.values())).nodes:
+            if jheader in elem.tag:
+                exists = True
+                tag = elem
+                tag.text = (
+                    tag.text + bin_xml_escape(content) if tag.text is not None else None
+                )
+        if not exists:
+            tag = ET.Element(jheader)
+            tag.text = bin_xml_escape(content)
+            self.append(tag)
 
     def append_pass(self, report: TestReport) -> None:
         self.add_stats("passed")