diff --git a/backend/src/test/kotlin/uk/co/neviyn/observationdatabase/ObservationDatabaseApplicationTests.kt b/backend/src/test/kotlin/uk/co/neviyn/observationdatabase/ObservationDatabaseApplicationTests.kt
index c6a0dad..56badab 100644
--- a/backend/src/test/kotlin/uk/co/neviyn/observationdatabase/ObservationDatabaseApplicationTests.kt
+++ b/backend/src/test/kotlin/uk/co/neviyn/observationdatabase/ObservationDatabaseApplicationTests.kt
@@ -1,5 +1,6 @@
 package uk.co.neviyn.observationdatabase
 
+import junit.framework.TestCase.assertFalse
 import junit.framework.TestCase.assertNotNull
 import org.junit.Test
 import org.junit.runner.RunWith
@@ -22,5 +23,6 @@ class ObservationDatabaseApplicationTests {
     fun contextLoads() {
         assertNotNull(observationsController)
         assertNotNull(groupSessionController)
+        assertFalse(GroupSessionManager.isValid())
     }
 }
diff --git a/backend/src/test/kotlin/uk/co/neviyn/observationdatabase/controller/GroupSessionControllerTest.kt b/backend/src/test/kotlin/uk/co/neviyn/observationdatabase/controller/GroupSessionControllerTest.kt
index ab9a876..9153ab9 100644
--- a/backend/src/test/kotlin/uk/co/neviyn/observationdatabase/controller/GroupSessionControllerTest.kt
+++ b/backend/src/test/kotlin/uk/co/neviyn/observationdatabase/controller/GroupSessionControllerTest.kt
@@ -137,4 +137,17 @@ class GroupSessionControllerTest {
         val rc = RatingComponent(rating = 5)
         controller.addGroupObservation(GroupObservation("A Student", listOf(Scenario(0, "Different Title", rc, rc, rc, rc, rc, rc, rc, rc))))
     }
+
+    @Test
+    fun testSubmit_PartialData() {
+        val site = Site(1, "Test site")
+        Mockito.doReturn(Optional.of(site)).`when`(siteRepository).findById(1)
+        Mockito.doReturn(listOf(Tutor(1, "Mr X", site))).`when`(tutorRepository).findAllById(listOf(1))
+        controller.startGroupObservation(GroupObservationInit(1, TrainingType.INITIAL, listOf(1), listOf("Sample title")))
+        val rc = RatingComponent(rating = 5)
+        controller.addGroupObservation(GroupObservation("A Student", listOf(Scenario(0, "Sample title", RatingComponent(rating = 0), rc, rc, rc, rc, rc, rc, rc))))
+        assertEquals(1, GroupSessionManager.observations.size)
+        assertEquals("A Student", GroupSessionManager.observations.keys.first())
+        assertEquals("A Student", GroupSessionManager.observations.values.first().person)
+    }
 }
\ No newline at end of file