diff --git a/app/src/main/java/org/tasks/sync/microsoft/MicrosoftConverter.kt b/app/src/main/java/org/tasks/sync/microsoft/MicrosoftConverter.kt
index 6be350d67..2e1fac274 100644
--- a/app/src/main/java/org/tasks/sync/microsoft/MicrosoftConverter.kt
+++ b/app/src/main/java/org/tasks/sync/microsoft/MicrosoftConverter.kt
@@ -5,7 +5,8 @@ import org.tasks.data.CaldavTask
 import org.tasks.data.TagData
 import org.tasks.time.DateTime
 import java.text.SimpleDateFormat
-import java.util.*
+import java.util.Locale
+import java.util.TimeZone
 
 object MicrosoftConverter {
 
@@ -26,7 +27,7 @@ object MicrosoftConverter {
         completionDate = remote.completedDateTime
             ?.let {
                 val tz = TimeZone.getTimeZone(it.timeZone)
-                SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss.ssssss")
+                SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss.ssssss", Locale.US)
                     .apply { timeZone = tz }
                     .parse(it.dateTime)
                     ?.time
diff --git a/app/src/test/java/org/tasks/sync/microsoft/ConvertFromMicrosoftTests.kt b/app/src/test/java/org/tasks/sync/microsoft/ConvertFromMicrosoftTests.kt
index f71a113d8..09516df3b 100644
--- a/app/src/test/java/org/tasks/sync/microsoft/ConvertFromMicrosoftTests.kt
+++ b/app/src/test/java/org/tasks/sync/microsoft/ConvertFromMicrosoftTests.kt
@@ -3,8 +3,10 @@ package org.tasks.sync.microsoft
 import com.natpryce.makeiteasy.MakeItEasy
 import com.todoroo.astrid.data.Task
 import org.junit.Assert
+import org.junit.Assert.assertEquals
 import org.junit.Test
 import org.tasks.TestUtilities
+import org.tasks.TestUtilities.withTZ
 import org.tasks.makers.TaskMaker
 import org.tasks.time.DateTime
 
@@ -12,7 +14,7 @@ class ConvertFromMicrosoftTests {
     @Test
     fun titleFromRemote() {
         val (local, _) = TestUtilities.mstodo("microsoft/basic_task.txt")
-        Assert.assertEquals("Basic task", local.title)
+        assertEquals("Basic task", local.title)
     }
 
     @Test
@@ -28,7 +30,7 @@ class ConvertFromMicrosoftTests {
             task = TaskMaker.newTask(MakeItEasy.with(TaskMaker.PRIORITY, Task.Priority.MEDIUM)),
             defaultPriority = Task.Priority.LOW
         )
-        Assert.assertEquals(Task.Priority.MEDIUM, local.priority)
+        assertEquals(Task.Priority.MEDIUM, local.priority)
     }
 
     @Test
@@ -38,7 +40,7 @@ class ConvertFromMicrosoftTests {
             task = TaskMaker.newTask(MakeItEasy.with(TaskMaker.PRIORITY, Task.Priority.HIGH)),
             defaultPriority = Task.Priority.LOW
         )
-        Assert.assertEquals(Task.Priority.LOW, local.priority)
+        assertEquals(Task.Priority.LOW, local.priority)
     }
 
     @Test
@@ -48,18 +50,20 @@ class ConvertFromMicrosoftTests {
             task = TaskMaker.newTask(MakeItEasy.with(TaskMaker.PRIORITY, Task.Priority.HIGH)),
             defaultPriority = Task.Priority.HIGH
         )
-        Assert.assertEquals(Task.Priority.NONE, local.priority)
+        assertEquals(Task.Priority.NONE, local.priority)
     }
 
     @Test
     fun noCompletionDate() {
         val (local, _) = TestUtilities.mstodo("microsoft/basic_task.txt")
-        Assert.assertEquals(0, local.completionDate)
+        assertEquals(0, local.completionDate)
     }
 
     @Test
     fun parseCompletionDate() {
         val (local, _) = TestUtilities.mstodo("microsoft/completed_task.txt")
-        Assert.assertEquals(DateTime(2022, 9, 18, 0, 0).millis, local.completionDate)
+        withTZ("America/Chicago") {
+            assertEquals(DateTime(2022, 9, 18, 0, 0).millis, local.completionDate)
+        }
     }
 }
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