diff --git a/doc/changelog.d/787.added.md b/doc/changelog.d/787.added.md
new file mode 100644
index 000000000..210d9d7cd
--- /dev/null
+++ b/doc/changelog.d/787.added.md
@@ -0,0 +1 @@
+FEAT: Add test for building gallery
\ No newline at end of file
diff --git a/tests/embedding/test_app.py b/tests/embedding/test_app.py
index 490619b86..e9d138955 100644
--- a/tests/embedding/test_app.py
+++ b/tests/embedding/test_app.py
@@ -262,6 +262,32 @@ def test_normal_appdata(pytestconfig, run_subprocess, rootdir):
     assert "ShowTriad value is False" in stdout
 
 
+@pytest.mark.embedding_scripts
+def test_building_gallery(pytestconfig, run_subprocess, rootdir):
+    """Test for building gallery check.
+
+    When building the gallery, each example file creates another instance of the app.
+    When the BUILDING_GALLERY flag is enabled, only one instance is kept.
+    This is to test the bug fixed in https://github.com/ansys/pymechanical/pull/784
+    and will fail on PyMechanical version 0.11.0
+    """
+    version = pytestconfig.getoption("ansys_version")
+
+    embedded_gallery_py = os.path.join(rootdir, "tests", "scripts", "build_gallery_test.py")
+
+    _, stderr = run_subprocess([sys.executable, embedded_gallery_py, version, "False"], None, False)
+    stderr = stderr.decode()
+
+    # Assert Exception
+    assert "Cannot have more than one embedded mechanical instance" in stderr
+
+    stdout, _ = run_subprocess([sys.executable, embedded_gallery_py, version, "True"])
+    stdout = stdout.decode()
+
+    # Assert stdout after launching multiple instances
+    assert "Multiple App launched with building gallery flag on" in stdout
+
+
 @pytest.mark.embedding
 def test_rm_lockfile(embedded_app, tmp_path: pytest.TempPathFactory):
     """Test lock file is removed on close of embedded application."""
diff --git a/tests/scripts/build_gallery_test.py b/tests/scripts/build_gallery_test.py
new file mode 100644
index 000000000..ead9afe63
--- /dev/null
+++ b/tests/scripts/build_gallery_test.py
@@ -0,0 +1,50 @@
+# Copyright (C) 2022 - 2024 ANSYS, Inc. and/or its affiliates.
+# SPDX-License-Identifier: MIT
+#
+#
+# Permission is hereby granted, free of charge, to any person obtaining a copy
+# of this software and associated documentation files (the "Software"), to deal
+# in the Software without restriction, including without limitation the rights
+# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+# copies of the Software, and to permit persons to whom the Software is
+# furnished to do so, subject to the following conditions:
+#
+# The above copyright notice and this permission notice shall be included in all
+# copies or substantial portions of the Software.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+# SOFTWARE.
+
+"""Launch embedded instance with build gallery flag."""
+import sys
+
+import ansys.mechanical.core as pymechanical
+
+
+def launch_app(version):
+    """Launch embedded instance of app."""
+    # Configuration.configure(level=logging.DEBUG, to_stdout=True, base_directory=None)
+    app = pymechanical.App(version=version)
+    app.update_globals(globals())
+    return app
+
+
+if __name__ == "__main__":
+    version = int(sys.argv[1])
+    build_gallery_flag = sys.argv[2]
+    app1 = launch_app(version)
+
+    if build_gallery_flag == "True":
+
+        pymechanical.BUILDING_GALLERY = True
+
+        app2 = launch_app(version)
+        print("Multiple App launched with building gallery flag on")
+
+    elif build_gallery_flag == "False":
+        app2 = launch_app(version)