diff --git a/uhabits-android/src/androidTest/java/org/isoron/uhabits/performance/PerformanceTest.java b/uhabits-android/src/androidTest/java/org/isoron/uhabits/performance/PerformanceTest.java
deleted file mode 100644
index 7c7402a8e..000000000
--- a/uhabits-android/src/androidTest/java/org/isoron/uhabits/performance/PerformanceTest.java
+++ /dev/null
@@ -1,78 +0,0 @@
-/*
- * Copyright (C) 2016-2021 Álinson Santos Xavier <git@axavier.org>
- *
- * This file is part of Loop Habit Tracker.
- *
- * Loop Habit Tracker 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 3 of the License, or (at your
- * option) any later version.
- *
- * Loop Habit Tracker 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 this program. If not, see <http://www.gnu.org/licenses/>.
- */
-
-package org.isoron.uhabits.performance;
-
-import androidx.test.ext.junit.runners.*;
-import androidx.test.filters.*;
-
-import org.isoron.uhabits.*;
-import org.isoron.uhabits.core.commands.*;
-import org.isoron.uhabits.core.database.*;
-import org.isoron.uhabits.core.models.*;
-import org.isoron.uhabits.core.models.sqlite.*;
-import org.junit.*;
-import org.junit.runner.*;
-
-import static org.isoron.uhabits.core.models.Timestamp.*;
-
-@RunWith(AndroidJUnit4.class)
-@MediumTest
-public class PerformanceTest extends BaseAndroidTest
-{
-    private Habit habit;
-
-    @Override
-    public void setUp()
-    {
-        super.setUp();
-        habit = fixtures.createLongHabit();
-    }
-
-    @Ignore
-    @Test(timeout = 5000)
-    public void benchmarkCreateHabitCommand()
-    {
-        Database db = ((SQLModelFactory) modelFactory).getDatabase();
-        db.beginTransaction();
-        for (int i = 0; i < 1_000; i++)
-        {
-            Habit model = modelFactory.buildHabit();
-            new CreateHabitCommand(modelFactory, habitList, model).run();
-        }
-        db.setTransactionSuccessful();
-        db.endTransaction();
-    }
-
-    @Ignore
-    @Test(timeout = 5000)
-    public void benchmarkCreateRepetitionCommand()
-    {
-        Database db = ((SQLModelFactory) modelFactory).getDatabase();
-        db.beginTransaction();
-        Habit habit = fixtures.createEmptyHabit();
-        for (int i = 0; i < 5_000; i++)
-        {
-            Timestamp timestamp = new Timestamp(i * DAY_LENGTH);
-            new CreateRepetitionCommand(habitList, habit, timestamp, 1).run();
-        }
-        db.setTransactionSuccessful();
-        db.endTransaction();
-    }
-}
diff --git a/uhabits-android/src/androidTest/java/org/isoron/uhabits/performance/PerformanceTest.kt b/uhabits-android/src/androidTest/java/org/isoron/uhabits/performance/PerformanceTest.kt
new file mode 100644
index 000000000..10ad56057
--- /dev/null
+++ b/uhabits-android/src/androidTest/java/org/isoron/uhabits/performance/PerformanceTest.kt
@@ -0,0 +1,69 @@
+/*
+ * Copyright (C) 2016-2021 Álinson Santos Xavier <git@axavier.org>
+ *
+ * This file is part of Loop Habit Tracker.
+ *
+ * Loop Habit Tracker 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 3 of the License, or (at your
+ * option) any later version.
+ *
+ * Loop Habit Tracker 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 this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+package org.isoron.uhabits.performance
+
+import androidx.test.ext.junit.runners.AndroidJUnit4
+import androidx.test.filters.MediumTest
+import org.isoron.uhabits.BaseAndroidTest
+import org.isoron.uhabits.core.commands.CreateHabitCommand
+import org.isoron.uhabits.core.commands.CreateRepetitionCommand
+import org.isoron.uhabits.core.models.Habit
+import org.isoron.uhabits.core.models.Timestamp
+import org.isoron.uhabits.core.models.Timestamp.Companion.DAY_LENGTH
+import org.isoron.uhabits.core.models.sqlite.SQLModelFactory
+import org.junit.Ignore
+import org.junit.Test
+import org.junit.runner.RunWith
+
+@RunWith(AndroidJUnit4::class)
+@MediumTest
+class PerformanceTest : BaseAndroidTest() {
+    private var habit: Habit? = null
+    override fun setUp() {
+        super.setUp()
+        habit = fixtures.createLongHabit()
+    }
+
+    @Ignore
+    @Test(timeout = 5000)
+    fun benchmarkCreateHabitCommand() {
+        val db = (modelFactory as SQLModelFactory).database
+        db.beginTransaction()
+        for (i in 0..999) {
+            val model = modelFactory.buildHabit()
+            CreateHabitCommand(modelFactory, habitList, model).run()
+        }
+        db.setTransactionSuccessful()
+        db.endTransaction()
+    }
+
+    @Ignore
+    @Test(timeout = 5000)
+    fun benchmarkCreateRepetitionCommand() {
+        val db = (modelFactory as SQLModelFactory).database
+        db.beginTransaction()
+        val habit = fixtures.createEmptyHabit()
+        for (i in 0..4999) {
+            val timestamp: Timestamp = Timestamp(i * DAY_LENGTH)
+            CreateRepetitionCommand(habitList, habit, timestamp, 1).run()
+        }
+        db.setTransactionSuccessful()
+        db.endTransaction()
+    }
+}