diff --git a/sources/ui/configpage/generalconfigurationpage.cpp b/sources/ui/configpage/generalconfigurationpage.cpp
index 05688b006..6dd1916e8 100644
--- a/sources/ui/configpage/generalconfigurationpage.cpp
+++ b/sources/ui/configpage/generalconfigurationpage.cpp
@@ -395,9 +395,6 @@ void GeneralConfigurationPage::applyConf()
 		if (!ui->m_live_assistant->isChecked()) LiveServer::instance().stop();
 #endif
 	}
-		//What an assistant reads about this QElectroTech follows the change
-	AssistantInfo::write();
-
 		//GENERIC PANEL
 	settings.setValue("genericpanel/folio",ui->m_use_folio_label->isChecked());
 
@@ -565,6 +562,12 @@ void GeneralConfigurationPage::applyConf()
 			diagram->update();
 		}
 	}
+
+		//What an assistant reads about this QElectroTech follows the
+		//change. Written last: the collection and title block paths are
+		//applied above, and an assistant launching a headless run takes
+		//the user and company collections from this file.
+	AssistantInfo::write();
 }
 
 /**
diff --git a/tests/qttest/CMakeLists.txt b/tests/qttest/CMakeLists.txt
index 1304bc356..3f7487f28 100644
--- a/tests/qttest/CMakeLists.txt
+++ b/tests/qttest/CMakeLists.txt
@@ -267,6 +267,10 @@ endfunction()
 # alone and with a group.
 qet_add_app_test(tst_rotateselectionimage tst_rotateselectionimage.cpp)
 
+# Accepting the settings dialog writes qet-assistant.json with the
+# collection paths just chosen, not the ones they replace.
+qet_add_app_test(tst_assistantinfopaths tst_assistantinfopaths.cpp)
+
 # Escape during a picture's resize, rotate or pivot drag puts it back, keeps
 # it selected and records no undo step (#1414); the key goes to the view.
 qet_add_app_test(tst_imagehandleescape tst_imagehandleescape.cpp)
diff --git a/tests/qttest/tst_assistantinfopaths.cpp b/tests/qttest/tst_assistantinfopaths.cpp
new file mode 100644
index 000000000..96e99dd67
--- /dev/null
+++ b/tests/qttest/tst_assistantinfopaths.cpp
@@ -0,0 +1,100 @@
+/*
+	Copyright 2006-2026 The QElectroTech Team
+	This file is part of QElectroTech.
+
+	QElectroTech is free software: you can redistribute it and/or modify
+	it under the terms of the GNU General Public License as published by
+	the Free Software Foundation, either version 2 of the License, or
+	(at your option) any later version.
+
+	QElectroTech is distributed in the hope that it will be useful,
+	but WITHOUT ANY WARRANTY; without even the implied warranty of
+	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+	GNU General Public License for more details.
+
+	You should have received a copy of the GNU General Public License
+	along with QElectroTech.  If not, see <http://www.gnu.org/licenses/>.
+*/
+#include "qetapptest.h"
+#include "scripting/assistantinfo.h"
+#include "ui/configpage/generalconfigurationpage.h"
+
+#include <QComboBox>
+#include <QDir>
+#include <QFile>
+#include <QJsonDocument>
+#include <QJsonObject>
+#include <QSignalBlocker>
+#include <QStandardPaths>
+
+/**
+	qet-assistant.json names the user and company collections, and the qet
+	MCP server hands them to every headless run it starts. Accepting the
+	settings dialog wrote the file before the dialog applied the new
+	collection paths, so the file kept the old ones: a company collection
+	chosen in the dialog stayed unknown to the assistant, and company://
+	paths failed in its runs, until QElectroTech was started again.
+*/
+class tst_assistantinfopaths : public QObject
+{
+	Q_OBJECT
+
+	static QString writtenPath(const QString &key)
+	{
+		QFile file(AssistantInfo::path());
+		if (!file.open(QIODevice::ReadOnly))
+			return QString();
+		const QJsonObject folders = QJsonDocument::fromJson(file.readAll())
+				.object().value(QStringLiteral("folders")).toObject();
+		return QDir::cleanPath(folders.value(key).toString());
+	}
+
+	static void choose(GeneralConfigurationPage &page, const QString &box, const QString &path)
+	{
+		auto *combo = page.findChild<QComboBox *>(box);
+		QVERIFY(combo);
+			//The state the page itself leaves once a folder is picked;
+			//signals blocked, or index 1 opens the folder dialog
+		const QSignalBlocker blocker(combo);
+		combo->setCurrentIndex(1);
+		combo->setItemData(1, path, Qt::DisplayRole);
+	}
+
+private slots:
+	void companyCollectionChosenInTheDialogIsWritten()
+	{
+		QTemporaryDir company;
+		QVERIFY(company.isValid());
+
+		GeneralConfigurationPage page;
+		choose(page, QStringLiteral("m_company_elmt_path_cb"), company.path());
+		page.applyConf();
+
+		QCOMPARE(writtenPath(QStringLiteral("elements_company")),
+				 QDir::cleanPath(company.path()));
+	}
+
+	void customCollectionChosenInTheDialogIsWritten()
+	{
+		QTemporaryDir custom;
+		QVERIFY(custom.isValid());
+
+		GeneralConfigurationPage page;
+		choose(page, QStringLiteral("m_custom_elmt_path_cb"), custom.path());
+		page.applyConf();
+
+		QCOMPARE(writtenPath(QStringLiteral("elements_custom")),
+				 QDir::cleanPath(custom.path()));
+	}
+};
+
+int main(int argc, char **argv)
+{
+		//AssistantInfo writes to the standard data folder, whatever
+		//--data-dir says, and QETApp writes it as its editor opens: test
+		//mode from the very start keeps the user's own file out of reach.
+	QStandardPaths::setTestModeEnabled(true);
+	return QetAppTest::run<tst_assistantinfopaths>(argc, argv);
+}
+
+#include "tst_assistantinfopaths.moc"