diff --git a/tests/TestUtil.h b/tests/TestUtil.h
index 865fcf87..5de8c4f2 100644
--- a/tests/TestUtil.h
+++ b/tests/TestUtil.h
@@ -24,11 +24,18 @@ struct TestsInternal
 #define MULTIMC_GET_TEST_FILE(file) TestsInternal::readFile(QFINDTESTDATA( file ))
 #define MULTIMC_GET_TEST_FILE_UTF8(file) TestsInternal::readFileUtf8(QFINDTESTDATA( file ))
 
+#ifdef Q_OS_LINUX
+# define _MMC_EXTRA_ARGV , "-platform", "offscreen"
+# define _MMC_EXTRA_ARGC 2
+#else
+# define _MMC_EXTRA_ARGV
+# define _MMC_EXTRA_ARGC 0
+#endif
 #define QTEST_GUILESS_MAIN_MULTIMC(TestObject) \
 int main(int argc, char *argv[]) \
 { \
-	char *argv_[] = { argv[0] }; \
-	int argc_ = 1; \
+	char *argv_[] = { argv[0] _MMC_EXTRA_ARGV }; \
+	int argc_ = 1 + _MMC_EXTRA_ARGC; \
 	MultiMC app(argc_, argv_, QDir::temp().absoluteFilePath("MultiMC_Test")); \
 	app.setAttribute(Qt::AA_Use96Dpi, true); \
 	TestObject tc; \
diff --git a/tests/data/channels.json b/tests/data/channels.json
index dd99fd27..e4f04bff 100644
--- a/tests/data/channels.json
+++ b/tests/data/channels.json
@@ -5,7 +5,7 @@
 			"id": "develop",
 			"name": "Develop",
 			"description": "The channel called \"develop\"",
-			"url": "http://example.org/stuff"
+			"url": "file://$PWD/tests/data/"
 		},
 		{
 			"id": "stable",
diff --git a/tests/tst_UpdateChecker.cpp b/tests/tst_UpdateChecker.cpp
index 302473f7..0f023f0e 100644
--- a/tests/tst_UpdateChecker.cpp
+++ b/tests/tst_UpdateChecker.cpp
@@ -14,6 +14,12 @@ bool operator==(const UpdateChecker::ChannelListEntry &e1, const UpdateChecker::
 			e1.url == e2.url;
 }
 
+QDebug operator<<(QDebug dbg, const UpdateChecker::ChannelListEntry &c)
+{
+	dbg.nospace() << "ChannelListEntry(id=" << c.id << " name=" << c.name << " description=" << c.description << " url=" << c.url << ")";
+	return dbg.maybeSpace();
+}
+
 class UpdateCheckerTest : public QObject
 {
 	Q_OBJECT
@@ -70,7 +76,7 @@ slots:
 				<< true
 				<< true
 				<< (QList<UpdateChecker::ChannelListEntry>()
-					<< UpdateChecker::ChannelListEntry{"develop", "Develop", "The channel called \"develop\"", "http://example.org/stuff"}
+					<< UpdateChecker::ChannelListEntry{"develop", "Develop", "The channel called \"develop\"", "file://$PWD/tests/data/"}
 					<< UpdateChecker::ChannelListEntry{"stable", "Stable", "It's stable at least", "ftp://username@host/path/to/stuff"}
 					<< UpdateChecker::ChannelListEntry{"42", "The Channel", "This is the channel that is going to answer all of your questions", "https://dent.me/tea"});
 	}
@@ -103,7 +109,6 @@ slots:
 			QCOMPARE(channelListLoadedSpy.size(), 0);
 		}
 
-
 		QCOMPARE(checker.hasChannels(), hasChannels);
 		QCOMPARE(checker.getChannelList(), result);
 	}