diff --git a/logic/minecraft/ModList.cpp b/logic/minecraft/ModList.cpp
index 43499612..a1640d2e 100644
--- a/logic/minecraft/ModList.cpp
+++ b/logic/minecraft/ModList.cpp
@@ -575,7 +575,6 @@ bool ModList::dropMimeData(const QMimeData *data, Qt::DropAction action, int row
 			if (!url.isLocalFile())
 				continue;
 			QString filename = url.toLocalFile();
-			qDebug() << "installing: " << filename;
 			installMod(filename, row);
 			// if there is no ordering, re-sort the list
 			if (m_list_file.isEmpty())
diff --git a/tests/CMakeLists.txt b/tests/CMakeLists.txt
index 15b542e8..efbcacbf 100644
--- a/tests/CMakeLists.txt
+++ b/tests/CMakeLists.txt
@@ -27,6 +27,7 @@ add_unit_test(FileSystem tst_FileSystem.cpp)
 add_unit_test(UpdateChecker tst_UpdateChecker.cpp)
 add_unit_test(DownloadTask tst_DownloadTask.cpp)
 add_unit_test(filematchers tst_filematchers.cpp)
+add_unit_test(ModList tst_ModList.cpp)
 add_unit_test(Resource tst_Resource.cpp)
 add_unit_test(GZip tst_GZip.cpp)
 
diff --git a/tests/tst_ModList.cpp b/tests/tst_ModList.cpp
new file mode 100644
index 00000000..09870245
--- /dev/null
+++ b/tests/tst_ModList.cpp
@@ -0,0 +1,52 @@
+
+#include <QTest>
+#include "TestUtil.h"
+
+#include "FileSystem.h"
+#include "minecraft/ModList.h"
+
+class ModListTest : public QObject
+{
+	Q_OBJECT
+
+private
+slots:
+	// test for GH-1178 - install a folder with files to a mod list
+	void test_1178()
+	{
+		// source
+		QString source = QFINDTESTDATA("tests/data/test_folder");
+
+		// sanity check
+		QVERIFY(!source.endsWith('/'));
+
+		auto verify = [](QString path)
+		{
+			QDir target_dir(FS::PathCombine(path, "test_folder"));
+			QVERIFY(target_dir.entryList().contains("pack.mcmeta"));
+			QVERIFY(target_dir.entryList().contains("assets"));
+		};
+
+		// 1. test with no trailing /
+		{
+			QString folder = source;
+			QTemporaryDir tempDir;
+			ModList m(tempDir.path());
+			m.installMod(folder);
+			verify(tempDir.path());
+		}
+
+		// 2. test with trailing /
+		{
+			QString folder = source + '/';
+			QTemporaryDir tempDir;
+			ModList m(tempDir.path());
+			m.installMod(folder);
+			verify(tempDir.path());
+		}
+	}
+};
+
+QTEST_GUILESS_MAIN(ModListTest)
+
+#include "tst_ModList.moc"