diff --git a/changelog/10607.bugfix.rst b/changelog/10607.bugfix.rst
new file mode 100644
index 000000000..e89504695
--- /dev/null
+++ b/changelog/10607.bugfix.rst
@@ -0,0 +1 @@
+Fix a race condition when creating junitxml reports, which could occur when multiple instances of pytest execute in parallel.
diff --git a/src/_pytest/junitxml.py b/src/_pytest/junitxml.py
index 7a5170f32..9242d46d9 100644
--- a/src/_pytest/junitxml.py
+++ b/src/_pytest/junitxml.py
@@ -645,8 +645,8 @@ class LogXML:
 
     def pytest_sessionfinish(self) -> None:
         dirname = os.path.dirname(os.path.abspath(self.logfile))
-        if not os.path.isdir(dirname):
-            os.makedirs(dirname)
+        # exist_ok avoids filesystem race conditions between checking path existence and requesting creation
+        os.makedirs(dirname, exist_ok=True)
 
         with open(self.logfile, "w", encoding="utf-8") as logfile:
             suite_stop_time = timing.time()
diff --git a/testing/conftest.py b/testing/conftest.py
index 107aad86b..8a9816799 100644
--- a/testing/conftest.py
+++ b/testing/conftest.py
@@ -157,6 +157,7 @@ def color_mapping():
             "number": "\x1b[94m",
             "str": "\x1b[33m",
             "print": "\x1b[96m",
+            "endline": "\x1b[90m\x1b[39;49;00m",
         }
         RE_COLORS = {k: re.escape(v) for k, v in COLORS.items()}
 
diff --git a/testing/io/test_terminalwriter.py b/testing/io/test_terminalwriter.py
index 6fe718b53..b5a04a99f 100644
--- a/testing/io/test_terminalwriter.py
+++ b/testing/io/test_terminalwriter.py
@@ -254,7 +254,7 @@ class TestTerminalWriterLineWidth:
         pytest.param(
             True,
             True,
-            "{kw}assert{hl-reset} {number}0{hl-reset}\n",
+            "{kw}assert{hl-reset} {number}0{hl-reset}{endline}\n",
             id="with markup and code_highlight",
         ),
         pytest.param(
diff --git a/testing/test_terminal.py b/testing/test_terminal.py
index 9de9a85f0..453f18323 100644
--- a/testing/test_terminal.py
+++ b/testing/test_terminal.py
@@ -1265,14 +1265,14 @@ def test_color_yes(pytester: Pytester, color_mapping) -> None:
                 "=*= FAILURES =*=",
                 "{red}{bold}_*_ test_this _*_{reset}",
                 "",
-                "    {kw}def{hl-reset} {function}test_this{hl-reset}():",
-                ">       fail()",
+                "    {kw}def{hl-reset} {function}test_this{hl-reset}():{endline}",
+                ">       fail(){endline}",
                 "",
                 "{bold}{red}test_color_yes.py{reset}:5: ",
                 "_ _ * _ _*",
                 "",
-                "    {kw}def{hl-reset} {function}fail{hl-reset}():",
-                ">       {kw}assert{hl-reset} {number}0{hl-reset}",
+                "    {kw}def{hl-reset} {function}fail{hl-reset}():{endline}",
+                ">       {kw}assert{hl-reset} {number}0{hl-reset}{endline}",
                 "{bold}{red}E       assert 0{reset}",
                 "",
                 "{bold}{red}test_color_yes.py{reset}:2: AssertionError",
@@ -1292,9 +1292,9 @@ def test_color_yes(pytester: Pytester, color_mapping) -> None:
                 "=*= FAILURES =*=",
                 "{red}{bold}_*_ test_this _*_{reset}",
                 "{bold}{red}test_color_yes.py{reset}:5: in test_this",
-                "    fail()",
+                "    fail(){endline}",
                 "{bold}{red}test_color_yes.py{reset}:2: in fail",
-                "    {kw}assert{hl-reset} {number}0{hl-reset}",
+                "    {kw}assert{hl-reset} {number}0{hl-reset}{endline}",
                 "{bold}{red}E   assert 0{reset}",
                 "{red}=*= {red}{bold}1 failed{reset}{red} in *s{reset}{red} =*={reset}",
             ]
@@ -2472,8 +2472,8 @@ class TestCodeHighlight:
         result.stdout.fnmatch_lines(
             color_mapping.format_for_fnmatch(
                 [
-                    "    {kw}def{hl-reset} {function}test_foo{hl-reset}():",
-                    ">       {kw}assert{hl-reset} {number}1{hl-reset} == {number}10{hl-reset}",
+                    "    {kw}def{hl-reset} {function}test_foo{hl-reset}():{endline}",
+                    ">       {kw}assert{hl-reset} {number}1{hl-reset} == {number}10{hl-reset}{endline}",
                     "{bold}{red}E       assert 1 == 10{reset}",
                 ]
             )
@@ -2494,9 +2494,9 @@ class TestCodeHighlight:
         result.stdout.fnmatch_lines(
             color_mapping.format_for_fnmatch(
                 [
-                    "    {kw}def{hl-reset} {function}test_foo{hl-reset}():",
+                    "    {kw}def{hl-reset} {function}test_foo{hl-reset}():{endline}",
                     "        {print}print{hl-reset}({str}'''{hl-reset}{str}{hl-reset}",
-                    ">   {str}    {hl-reset}{str}'''{hl-reset}); {kw}assert{hl-reset} {number}0{hl-reset}",
+                    ">   {str}    {hl-reset}{str}'''{hl-reset}); {kw}assert{hl-reset} {number}0{hl-reset}{endline}",
                     "{bold}{red}E       assert 0{reset}",
                 ]
             )
@@ -2517,8 +2517,8 @@ class TestCodeHighlight:
         result.stdout.fnmatch_lines(
             color_mapping.format_for_fnmatch(
                 [
-                    "    {kw}def{hl-reset} {function}test_foo{hl-reset}():",
-                    ">       {kw}assert{hl-reset} {number}1{hl-reset} == {number}10{hl-reset}",
+                    "    {kw}def{hl-reset} {function}test_foo{hl-reset}():{endline}",
+                    ">       {kw}assert{hl-reset} {number}1{hl-reset} == {number}10{hl-reset}{endline}",
                     "{bold}{red}E       assert 1 == 10{reset}",
                 ]
             )