diff --git a/README.md b/README.md
index 18dce9b020..22533e79fc 100644
--- a/README.md
+++ b/README.md
@@ -28,9 +28,14 @@ to format all Java code. To reformat the code run
 Yes it's a mouthful but unfortunately the [prettier-maven-plugin](https://github.com/HubSpot/prettier-maven-plugin)
 does not work due to an [outstanding issue](https://github.com/HubSpot/prettier-maven-plugin/issues/79).
 
-An easier way to reformat code is to set IntelliJ to do it on save. Go to
-`Settings -> Language & Frameworks -> JavaScript -> Prettier` and then check
+The formatting is validated by CI, but you should do it beforehand with a simple `./mvnw verify -pl .`.
+
+### Making IntelliJ format for you
+For this to work you also need to have [Node.js](https://nodejs.org)
+installed and configured under `Settings -> Language & Frameworks -> Node.js`
+and the file you're saving *must* be able to compile otherwise no formatting
+can be performed.
+
+Go to `Settings -> Language & Frameworks -> JavaScript -> Prettier` and then check
 `Automatic Prettier Configuration`, set `Run for files` to `**/*.{java}`,
 and finally check `Run on save`.
-
-The formatting is validated by CI, but you should do it beforehand with a simple `./mvnw verify -pl .`.
diff --git a/core/pom.xml b/core/pom.xml
index a3c2a1a1e9..e34cb44596 100644
--- a/core/pom.xml
+++ b/core/pom.xml
@@ -86,8 +86,23 @@
             <scope>test</scope>
         </dependency>
         <dependency>
-            <groupId>org.hsqldb</groupId>
-            <artifactId>hsqldb</artifactId>
+            <groupId>org.testcontainers</groupId>
+            <artifactId>junit-jupiter</artifactId>
+            <scope>test</scope>
+        </dependency>
+        <dependency>
+            <groupId>org.testcontainers</groupId>
+            <artifactId>mariadb</artifactId>
+            <scope>test</scope>
+        </dependency>
+        <dependency>
+            <groupId>org.mariadb.jdbc</groupId>
+            <artifactId>mariadb-java-client</artifactId>
+            <scope>test</scope>
+        </dependency>
+        <dependency>
+            <groupId>org.flywaydb</groupId>
+            <artifactId>flyway-mysql</artifactId>
             <scope>test</scope>
         </dependency>
 
diff --git a/core/src/main/java/se/su/dsv/scipro/CoreConfig.java b/core/src/main/java/se/su/dsv/scipro/CoreConfig.java
index 2dc8f54929..43c4d7ed10 100644
--- a/core/src/main/java/se/su/dsv/scipro/CoreConfig.java
+++ b/core/src/main/java/se/su/dsv/scipro/CoreConfig.java
@@ -96,6 +96,7 @@ import se.su.dsv.scipro.match.TargetRepository;
 import se.su.dsv.scipro.match.TargetServiceImpl;
 import se.su.dsv.scipro.milestones.MilestoneActivityTemplateRepository;
 import se.su.dsv.scipro.milestones.service.ActivateCompletedMilestonesOnNewProjects;
+import se.su.dsv.scipro.milestones.service.MilestoneActivator;
 import se.su.dsv.scipro.milestones.service.MilestoneActivityTemplateService;
 import se.su.dsv.scipro.milestones.service.impl.MilestoneActivityTemplateServiceImpl;
 import se.su.dsv.scipro.milestones.service.impl.MilestonePhaseTemplateServiceImpl;
@@ -1129,4 +1130,21 @@ public class CoreConfig {
     public GroupFacadeImpl groupFacade() {
         return new GroupFacadeImpl();
     }
+
+    @Bean
+    public MilestoneActivator milestoneActivator(
+        EventBus eventBus,
+        MilestoneServiceImpl milestoneService,
+        MilestoneActivityTemplateService milestoneActivityTemplateService,
+        FinalSeminarService finalSeminarService,
+        NotificationController notificationController
+    ) {
+        return new MilestoneActivator(
+            milestoneActivityTemplateService,
+            milestoneService,
+            eventBus,
+            finalSeminarService,
+            notificationController
+        );
+    }
 }
diff --git a/core/src/main/java/se/su/dsv/scipro/report/GradeCalculator.java b/core/src/main/java/se/su/dsv/scipro/report/GradeCalculator.java
index 55cd0c3343..67abd527b3 100644
--- a/core/src/main/java/se/su/dsv/scipro/report/GradeCalculator.java
+++ b/core/src/main/java/se/su/dsv/scipro/report/GradeCalculator.java
@@ -1,8 +1,6 @@
 package se.su.dsv.scipro.report;
 
-import java.io.Serializable;
-
-public interface GradeCalculator extends Serializable {
+public interface GradeCalculator {
     GradingReport.Grade getGrade(GradingReport gradingReport);
 
     long getPoints(GradingReport gradingReport);
diff --git a/core/src/main/resources/META-INF/persistence.xml b/core/src/main/resources/META-INF/persistence.xml
index fc5f0a5977..902cc7aeae 100755
--- a/core/src/main/resources/META-INF/persistence.xml
+++ b/core/src/main/resources/META-INF/persistence.xml
@@ -4,9 +4,6 @@
              xsi:schemaLocation="https://jakarta.ee/xml/ns/persistence https://jakarta.ee/xml/ns/persistence/persistence_3_0.xsd"
              version="3.0">
 
-    <!-- NOTE THAT THERE ARE TWO PERSISTENCE UNITS, one default and one test
-            used for either running or unit-tests -->
-
     <!-- A JPA Persistence Unit -->
     <persistence-unit name="defaultPersistenceUnit"
                       transaction-type="RESOURCE_LOCAL">
@@ -17,13 +14,4 @@
         </properties>
     </persistence-unit>
 
-    <!-- A JPA Persistence Unit used for tests -->
-    <persistence-unit name="testPersistenceUnit"
-                      transaction-type="RESOURCE_LOCAL">
-        <properties>
-            <property name="jakarta.persistence.jdbc.driver" value="org.hsqldb.jdbc.JDBCDriver"/>
-            <property name="jakarta.persistence.jdbc.url" value="jdbc:hsqldb:mem:test"/>
-            <property name="hibernate.hbm2ddl.auto" value="create"/>
-        </properties>
-    </persistence-unit>
 </persistence>
diff --git a/core/src/test/java/se/su/dsv/scipro/finalseminar/FinalSeminarSchedulingTest.java b/core/src/test/java/se/su/dsv/scipro/finalseminar/FinalSeminarSchedulingTest.java
index 23ebd8113c..cca047aed5 100644
--- a/core/src/test/java/se/su/dsv/scipro/finalseminar/FinalSeminarSchedulingTest.java
+++ b/core/src/test/java/se/su/dsv/scipro/finalseminar/FinalSeminarSchedulingTest.java
@@ -197,6 +197,7 @@ public class FinalSeminarSchedulingTest extends IntegrationTest {
         NonWorkDayPeriod nonWorkDayPeriod = new NonWorkDayPeriod();
         nonWorkDayPeriod.setStartDate(date);
         nonWorkDayPeriod.setEndDate(date);
+        nonWorkDayPeriod.setComment("test non work day");
         save(nonWorkDayPeriod);
     }
 
diff --git a/core/src/test/java/se/su/dsv/scipro/peer/CommentThreadServiceImplTest.java b/core/src/test/java/se/su/dsv/scipro/peer/CommentThreadServiceImplTest.java
index cd037f3ee5..625162f167 100644
--- a/core/src/test/java/se/su/dsv/scipro/peer/CommentThreadServiceImplTest.java
+++ b/core/src/test/java/se/su/dsv/scipro/peer/CommentThreadServiceImplTest.java
@@ -12,6 +12,7 @@ import se.su.dsv.scipro.file.FileDescription;
 import se.su.dsv.scipro.file.FileReference;
 import se.su.dsv.scipro.project.Project;
 import se.su.dsv.scipro.system.DegreeType;
+import se.su.dsv.scipro.system.Language;
 import se.su.dsv.scipro.system.ProjectType;
 import se.su.dsv.scipro.system.User;
 import se.su.dsv.scipro.test.Dates;
@@ -66,6 +67,7 @@ public class CommentThreadServiceImplTest extends IntegrationTest {
         PeerRequest peerRequest = new PeerRequest();
         peerRequest.setProject(project);
         peerRequest.setRequester(createUser());
+        peerRequest.setLanguage(Language.ENGLISH);
         final FileDescription fileDescription = save(new FileDescription());
         final FileReference fileReference = new FileReference();
         fileReference.setFileDescription(fileDescription);
diff --git a/core/src/test/java/se/su/dsv/scipro/peer/PeerRequestServiceImplTest.java b/core/src/test/java/se/su/dsv/scipro/peer/PeerRequestServiceImplTest.java
index 215e6c5f45..fc98ba6f7b 100644
--- a/core/src/test/java/se/su/dsv/scipro/peer/PeerRequestServiceImplTest.java
+++ b/core/src/test/java/se/su/dsv/scipro/peer/PeerRequestServiceImplTest.java
@@ -13,6 +13,7 @@ import se.su.dsv.scipro.file.FileDescription;
 import se.su.dsv.scipro.file.FileReference;
 import se.su.dsv.scipro.project.Project;
 import se.su.dsv.scipro.system.DegreeType;
+import se.su.dsv.scipro.system.Language;
 import se.su.dsv.scipro.system.PageRequest;
 import se.su.dsv.scipro.system.ProjectType;
 import se.su.dsv.scipro.system.User;
@@ -158,6 +159,7 @@ public class PeerRequestServiceImplTest extends IntegrationTest {
         peerRequest.setProject(project);
         peerRequest.setRequester(requester);
         peerRequest.setStatus(status);
+        peerRequest.setLanguage(Language.ENGLISH);
         final FileDescription fileDescription = save(new FileDescription());
         final FileReference fileReference = new FileReference();
         fileReference.setFileDescription(fileDescription);
diff --git a/core/src/test/java/se/su/dsv/scipro/peer/PeerReviewServiceImplIntegrationTest.java b/core/src/test/java/se/su/dsv/scipro/peer/PeerReviewServiceImplIntegrationTest.java
index 15a004fd89..a954f455be 100644
--- a/core/src/test/java/se/su/dsv/scipro/peer/PeerReviewServiceImplIntegrationTest.java
+++ b/core/src/test/java/se/su/dsv/scipro/peer/PeerReviewServiceImplIntegrationTest.java
@@ -14,6 +14,7 @@ import se.su.dsv.scipro.file.FileDescription;
 import se.su.dsv.scipro.file.FileReference;
 import se.su.dsv.scipro.project.Project;
 import se.su.dsv.scipro.system.DegreeType;
+import se.su.dsv.scipro.system.Language;
 import se.su.dsv.scipro.system.PageRequest;
 import se.su.dsv.scipro.system.ProjectType;
 import se.su.dsv.scipro.system.User;
@@ -102,6 +103,7 @@ public class PeerReviewServiceImplIntegrationTest extends IntegrationTest {
         PeerRequest peerRequest = new PeerRequest();
         peerRequest.setProject(createProject());
         peerRequest.setRequester(createUser());
+        peerRequest.setLanguage(Language.ENGLISH);
         final FileDescription fileDescription = save(new FileDescription());
         final FileReference fileReference = new FileReference();
         fileReference.setFileDescription(fileDescription);
diff --git a/core/src/test/java/se/su/dsv/scipro/peer/PeerReviewServiceImplTest.java b/core/src/test/java/se/su/dsv/scipro/peer/PeerReviewServiceImplTest.java
index 9c6a5dd3da..6495faaf7a 100644
--- a/core/src/test/java/se/su/dsv/scipro/peer/PeerReviewServiceImplTest.java
+++ b/core/src/test/java/se/su/dsv/scipro/peer/PeerReviewServiceImplTest.java
@@ -14,6 +14,7 @@ import se.su.dsv.scipro.file.FileDescription;
 import se.su.dsv.scipro.file.FileReference;
 import se.su.dsv.scipro.project.Project;
 import se.su.dsv.scipro.system.DegreeType;
+import se.su.dsv.scipro.system.Language;
 import se.su.dsv.scipro.system.PageRequest;
 import se.su.dsv.scipro.system.ProjectType;
 import se.su.dsv.scipro.system.User;
@@ -95,6 +96,7 @@ public class PeerReviewServiceImplTest extends IntegrationTest {
         peerRequest.setRequester(
             save(User.builder().firstName("Bob").lastName("Sponge").emailAddress("bob@example.com").build())
         );
+        peerRequest.setLanguage(Language.ENGLISH);
         final FileDescription fileDescription = save(new FileDescription());
         final FileReference fileReference = new FileReference();
         fileReference.setFileDescription(fileDescription);
diff --git a/core/src/test/java/se/su/dsv/scipro/peer/TestPeerReview.java b/core/src/test/java/se/su/dsv/scipro/peer/TestPeerReview.java
index 34e5e5c7e2..fe5e2be992 100755
--- a/core/src/test/java/se/su/dsv/scipro/peer/TestPeerReview.java
+++ b/core/src/test/java/se/su/dsv/scipro/peer/TestPeerReview.java
@@ -19,6 +19,7 @@ import se.su.dsv.scipro.file.FileDescription;
 import se.su.dsv.scipro.file.FileReference;
 import se.su.dsv.scipro.project.Project;
 import se.su.dsv.scipro.project.ProjectStatus;
+import se.su.dsv.scipro.system.Language;
 import se.su.dsv.scipro.system.PageRequest;
 import se.su.dsv.scipro.system.ProjectType;
 import se.su.dsv.scipro.system.User;
@@ -196,6 +197,7 @@ public class TestPeerReview extends IntegrationTest {
         request.setComment(comment);
         request.setRequester(requester);
         request.setProject(project);
+        request.setLanguage(Language.ENGLISH);
         final FileDescription fileDescription = save(new FileDescription());
         final FileReference fileReference = new FileReference();
         fileReference.setFileDescription(fileDescription);
diff --git a/core/src/test/java/se/su/dsv/scipro/plagiarism/urkund/UrkundSubmissionRepositoryTest.java b/core/src/test/java/se/su/dsv/scipro/plagiarism/urkund/UrkundSubmissionRepositoryTest.java
index c09f3ea67e..a3b40ed7ae 100644
--- a/core/src/test/java/se/su/dsv/scipro/plagiarism/urkund/UrkundSubmissionRepositoryTest.java
+++ b/core/src/test/java/se/su/dsv/scipro/plagiarism/urkund/UrkundSubmissionRepositoryTest.java
@@ -13,6 +13,7 @@ import org.hamcrest.TypeSafeMatcher;
 import org.junit.jupiter.api.Test;
 import se.su.dsv.scipro.file.FileDescription;
 import se.su.dsv.scipro.file.FileReference;
+import se.su.dsv.scipro.system.User;
 import se.su.dsv.scipro.test.SpringTest;
 
 public class UrkundSubmissionRepositoryTest extends SpringTest {
@@ -23,11 +24,14 @@ public class UrkundSubmissionRepositoryTest extends SpringTest {
     @Test
     public void save() {
         final Instant submitted = Instant.now();
+        User bob = User.builder().firstName("Bob").lastName("Sponge").emailAddress("bob@example.com").build();
+        save(bob);
         final UrkundSubmission submission = new UrkundSubmission();
         submission.setState(UrkundSubmission.State.SUBMITTED);
         submission.setMessage("Hi");
         submission.setSubmitted(submitted);
         submission.setNextPoll(submitted);
+        submission.setReceiver(bob);
         final FileDescription file = save(new FileDescription());
         final FileReference fileReference = new FileReference();
         fileReference.setFileDescription(file);
diff --git a/core/src/test/java/se/su/dsv/scipro/test/BeanDefinitionsTest.java b/core/src/test/java/se/su/dsv/scipro/test/BeanDefinitionsTest.java
new file mode 100644
index 0000000000..8dd6ff6130
--- /dev/null
+++ b/core/src/test/java/se/su/dsv/scipro/test/BeanDefinitionsTest.java
@@ -0,0 +1,18 @@
+package se.su.dsv.scipro.test;
+
+import static org.junit.jupiter.api.Assertions.assertNotNull;
+
+import jakarta.inject.Inject;
+import org.junit.jupiter.api.Test;
+import se.su.dsv.scipro.milestones.service.MilestoneActivator;
+
+public class BeanDefinitionsTest extends IntegrationTest {
+
+    @Inject
+    MilestoneActivator milestoneActivator;
+
+    @Test
+    public void milestone_activator() {
+        assertNotNull(milestoneActivator);
+    }
+}
diff --git a/core/src/test/java/se/su/dsv/scipro/test/SpringTest.java b/core/src/test/java/se/su/dsv/scipro/test/SpringTest.java
index 2b68b55008..04d0f70da7 100644
--- a/core/src/test/java/se/su/dsv/scipro/test/SpringTest.java
+++ b/core/src/test/java/se/su/dsv/scipro/test/SpringTest.java
@@ -4,28 +4,47 @@ import jakarta.persistence.EntityManager;
 import jakarta.persistence.EntityManagerFactory;
 import jakarta.persistence.EntityTransaction;
 import jakarta.persistence.Persistence;
+import java.sql.SQLException;
 import java.time.Clock;
+import java.util.Map;
 import java.util.Optional;
+import org.flywaydb.core.Flyway;
+import org.hibernate.cfg.Environment;
 import org.junit.jupiter.api.AfterEach;
 import org.junit.jupiter.api.BeforeEach;
+import org.mariadb.jdbc.MariaDbDataSource;
 import org.springframework.context.annotation.AnnotationConfigApplicationContext;
 import org.springframework.context.annotation.Bean;
 import org.springframework.context.annotation.Configuration;
 import org.springframework.context.annotation.Import;
+import org.testcontainers.containers.MariaDBContainer;
+import org.testcontainers.junit.jupiter.Container;
+import org.testcontainers.junit.jupiter.Testcontainers;
 import se.su.dsv.scipro.CoreConfig;
 import se.su.dsv.scipro.RepositoryConfiguration;
 import se.su.dsv.scipro.profiles.CurrentProfile;
 import se.su.dsv.scipro.sukat.Sukat;
 import se.su.dsv.scipro.system.CurrentUser;
 
+@Testcontainers
 public abstract class SpringTest {
 
     private EntityManager entityManager;
     private EntityManagerFactory entityManagerFactory;
 
+    @Container
+    static MariaDBContainer<?> mariaDBContainer = new MariaDBContainer<>("mariadb:10.11");
+
     @BeforeEach
-    public final void prepareSpring() {
-        entityManagerFactory = Persistence.createEntityManagerFactory("testPersistenceUnit");
+    public final void prepareSpring() throws SQLException {
+        MariaDbDataSource dataSource = new MariaDbDataSource(mariaDBContainer.getJdbcUrl());
+        dataSource.setUser(mariaDBContainer.getUsername());
+        dataSource.setPassword(mariaDBContainer.getPassword());
+
+        Flyway.configure().dataSource(dataSource).load().migrate();
+
+        Map<String, Object> jpaProperties = Map.of(Environment.JAKARTA_JTA_DATASOURCE, dataSource);
+        entityManagerFactory = Persistence.createEntityManagerFactory("defaultPersistenceUnit", jpaProperties);
         this.entityManager = entityManagerFactory.createEntityManager();
         EntityTransaction transaction = entityManager.getTransaction();
         transaction.begin();
diff --git a/pom.xml b/pom.xml
index e69b87c989..a4b4f57961 100755
--- a/pom.xml
+++ b/pom.xml
@@ -34,7 +34,6 @@
         <querydsl.version>5.0.0</querydsl.version>
         <jakarta.servlet.version>5.0.0</jakarta.servlet.version>
         <junit.version>5.9.3</junit.version>
-        <hsqldb.version>2.7.1</hsqldb.version>
         <mockito.version>5.3.1</mockito.version>
         <flyway.version>9.19.1</flyway.version>
         <jersey.version>3.1.6</jersey.version>
@@ -101,7 +100,7 @@
             <dependency>
                 <groupId>org.springframework.boot</groupId>
                 <artifactId>spring-boot-dependencies</artifactId>
-                <version>3.2.5</version>
+                <version>3.2.12</version>
                 <scope>import</scope>
                 <type>pom</type>
             </dependency>
@@ -133,14 +132,6 @@
                 <scope>import</scope>
             </dependency>
 
-            <!-- Database stuff -->
-            <dependency>
-                <groupId>org.hsqldb</groupId>
-                <artifactId>hsqldb</artifactId>
-                <version>${hsqldb.version}</version>
-                <scope>test</scope>
-            </dependency>
-
             <dependency>
                 <groupId>org.mariadb.jdbc</groupId>
                 <artifactId>mariadb-java-client</artifactId>
diff --git a/view/src/main/java/se/su/dsv/scipro/applicationperiod/AdminEditApplicationPeriodPage.html b/view/src/main/java/se/su/dsv/scipro/applicationperiod/AdminEditApplicationPeriodPage.html
index 04de12622c..8c5597de96 100644
--- a/view/src/main/java/se/su/dsv/scipro/applicationperiod/AdminEditApplicationPeriodPage.html
+++ b/view/src/main/java/se/su/dsv/scipro/applicationperiod/AdminEditApplicationPeriodPage.html
@@ -16,10 +16,8 @@
 
                 <fieldset class="mb-3">
                     <legend><wicket:message key="projectTypes"/></legend>
-                    <div class="form-check" wicket:id="projectTypes">
-                        <input type="checkbox" wicket:id="checkbox" class="form-check-input"/>
-                        <label class="form-check-label" wicket:for="checkbox"><span wicket:id="name"></span></label>
-                    </div>
+                    <div wicket:id="projectTypes"></div>
+                    <div wicket:id="projectTypesFeedback"></div>
                 </fieldset>
 
                 <div class="form-row">
diff --git a/view/src/main/java/se/su/dsv/scipro/applicationperiod/AdminEditApplicationPeriodPage.java b/view/src/main/java/se/su/dsv/scipro/applicationperiod/AdminEditApplicationPeriodPage.java
index 2409d13d83..8781578a73 100644
--- a/view/src/main/java/se/su/dsv/scipro/applicationperiod/AdminEditApplicationPeriodPage.java
+++ b/view/src/main/java/se/su/dsv/scipro/applicationperiod/AdminEditApplicationPeriodPage.java
@@ -4,17 +4,14 @@ import jakarta.inject.Inject;
 import java.time.LocalDate;
 import java.time.LocalTime;
 import java.util.List;
-import org.apache.wicket.extensions.model.AbstractCheckBoxModel;
 import org.apache.wicket.feedback.FencedFeedbackPanel;
-import org.apache.wicket.markup.html.basic.Label;
 import org.apache.wicket.markup.html.form.*;
-import org.apache.wicket.markup.html.list.ListItem;
-import org.apache.wicket.markup.html.list.ListView;
 import org.apache.wicket.markup.html.panel.ComponentFeedbackPanel;
 import org.apache.wicket.model.IModel;
 import org.apache.wicket.model.LambdaModel;
 import org.apache.wicket.model.LoadableDetachableModel;
 import org.apache.wicket.request.mapper.parameter.PageParameters;
+import se.su.dsv.scipro.components.BootstrapCheckBoxMultipleChoice;
 import se.su.dsv.scipro.components.BootstrapDatePicker;
 import se.su.dsv.scipro.components.BootstrapTimePicker;
 import se.su.dsv.scipro.components.DatesValidator;
@@ -39,7 +36,6 @@ public class AdminEditApplicationPeriodPage
     public static final String TITLE = "title";
     public static final String FEEDBACK = "Feedback";
     public static final String TITLE_FEEDBACK = "titleFeedback";
-    public static final String CHECKBOX = "checkbox";
 
     @Inject
     private ProjectTypeService projectTypeService;
@@ -62,19 +58,15 @@ public class AdminEditApplicationPeriodPage
             );
             add(new ComponentFeedbackPanel(TITLE_FEEDBACK, title));
             add(title);
-            add(
-                new ListView<>(PROJECT_TYPES, availableProjectTypes()) {
-                    @Override
-                    protected void populateItem(ListItem<ProjectType> item) {
-                        item.add(
-                            new CheckBox(CHECKBOX, new ProjectTypeSelectionModel(item.getModel())).setOutputMarkupId(
-                                true
-                            )
-                        );
-                        item.add(new Label("name", item.getModel().map(ProjectType::getName)));
-                    }
-                }
+            BootstrapCheckBoxMultipleChoice<ProjectType> projectTypeChoice = new BootstrapCheckBoxMultipleChoice<>(
+                PROJECT_TYPES,
+                LambdaModel.of(getModel(), ApplicationPeriod::getProjectTypes, ApplicationPeriod::setProjectTypes),
+                availableProjectTypes(),
+                new LambdaChoiceRenderer<>(ProjectType::getName, ProjectType::getId)
             );
+            projectTypeChoice.setRequired(true);
+            add(projectTypeChoice);
+            add(new FencedFeedbackPanel("projectTypesFeedback", projectTypeChoice));
             final FormComponent<LocalDate> startDate = addDateField(
                 START_DATE,
                 LambdaModel.of(getModel(), ApplicationPeriod::getStartDate, ApplicationPeriod::setStartDate)
@@ -139,30 +131,6 @@ public class AdminEditApplicationPeriodPage
                 getRootForm().error(getString("overlapping"));
             }
         }
-
-        private class ProjectTypeSelectionModel extends AbstractCheckBoxModel {
-
-            private final IModel<ProjectType> model;
-
-            public ProjectTypeSelectionModel(IModel<ProjectType> model) {
-                this.model = model;
-            }
-
-            @Override
-            public boolean isSelected() {
-                return getModelObject().getProjectTypes().contains(model.getObject());
-            }
-
-            @Override
-            public void select() {
-                getModelObject().addProjectType(model.getObject());
-            }
-
-            @Override
-            public void unselect() {
-                getModelObject().removeProjectType(model.getObject());
-            }
-        }
     }
 
     private LoadableDetachableModel<ApplicationPeriod> getLoaded(final PageParameters pp) {
diff --git a/view/src/main/java/se/su/dsv/scipro/applicationperiod/AdminEditApplicationPeriodPage.properties b/view/src/main/java/se/su/dsv/scipro/applicationperiod/AdminEditApplicationPeriodPage.properties
index f5095052d4..dc945a5788 100644
--- a/view/src/main/java/se/su/dsv/scipro/applicationperiod/AdminEditApplicationPeriodPage.properties
+++ b/view/src/main/java/se/su/dsv/scipro/applicationperiod/AdminEditApplicationPeriodPage.properties
@@ -14,4 +14,5 @@ success= Application period saved.
 overlapping= Overlapping application period already exists.
 date.Required= You need to specify a valid date.
 hours.Required= Hours field is required.
-minutes.Required= Minutes field is required.
\ No newline at end of file
+minutes.Required= Minutes field is required.
+projectTypes.Required=You must select at least one project type.
diff --git a/view/src/main/java/se/su/dsv/scipro/grading/GradingReportPointsPanel.java b/view/src/main/java/se/su/dsv/scipro/grading/GradingReportPointsPanel.java
index 593ee532c5..4f95d80881 100644
--- a/view/src/main/java/se/su/dsv/scipro/grading/GradingReportPointsPanel.java
+++ b/view/src/main/java/se/su/dsv/scipro/grading/GradingReportPointsPanel.java
@@ -4,7 +4,6 @@ import org.apache.wicket.markup.html.WebMarkupContainer;
 import org.apache.wicket.markup.html.basic.Label;
 import org.apache.wicket.markup.html.panel.Panel;
 import org.apache.wicket.model.IModel;
-import org.apache.wicket.model.LoadableDetachableModel;
 import se.su.dsv.scipro.components.OppositeVisibility;
 import se.su.dsv.scipro.report.GradeCalculator;
 import se.su.dsv.scipro.report.GradingReport;
@@ -18,15 +17,13 @@ public class GradingReportPointsPanel extends Panel {
     public GradingReportPointsPanel(
         String id,
         final IModel<? extends GradingReport> gradingReportIModel,
-        final GradeCalculator gradeCalculator
+        final IModel<GradeCalculator> gradeCalculator
     ) {
         super(id, gradingReportIModel);
-        final IModel<GradingReport.Grade> gradeModel = new LoadableDetachableModel<>() {
-            @Override
-            protected GradingReport.Grade load() {
-                return gradingReportIModel.getObject().getGrade(gradeCalculator);
-            }
-        };
+        final IModel<GradingReport.Grade> gradeModel = gradingReportIModel.combineWith(
+            gradeCalculator,
+            GradingReport::getGrade
+        );
         final Label grade = new Label(GRADE, gradeModel.map(GradingReport.Grade::name)) {
             @Override
             protected void onConfigure() {
@@ -36,12 +33,7 @@ public class GradingReportPointsPanel extends Panel {
         };
         add(grade);
 
-        final IModel<Long> points = new LoadableDetachableModel<>() {
-            @Override
-            protected Long load() {
-                return gradingReportIModel.getObject().getPoints(gradeCalculator);
-            }
-        };
+        final IModel<Long> points = gradingReportIModel.combineWith(gradeCalculator, GradingReport::getPoints);
         add(new Label(POINTS_LABEL, points));
 
         add(new WebMarkupContainer(NO_GRADE_EXPLANATION).add(new OppositeVisibility(grade)));
diff --git a/view/src/main/java/se/su/dsv/scipro/grading/IndividualAuthorAssessmentPanel.java b/view/src/main/java/se/su/dsv/scipro/grading/IndividualAuthorAssessmentPanel.java
index 6d4ba8e0d6..c9c0938a58 100644
--- a/view/src/main/java/se/su/dsv/scipro/grading/IndividualAuthorAssessmentPanel.java
+++ b/view/src/main/java/se/su/dsv/scipro/grading/IndividualAuthorAssessmentPanel.java
@@ -271,8 +271,8 @@ public class IndividualAuthorAssessmentPanel extends GenericPanel<User> {
                 new TemplatePanel("points_to_grade_conversion", gradingReport.map(SupervisorGradingReport::getProject))
             );
 
-            GradeCalculator supervisorCalculator = gradeCalculatorService.getSupervisorCalculator(
-                gradingReport.getObject().getProject()
+            IModel<GradeCalculator> supervisorCalculator = LoadableDetachableModel.of(() ->
+                gradeCalculatorService.getSupervisorCalculator(gradingReport.getObject().getProject())
             );
             add(new GradingReportPointsPanel("points", gradingReport, supervisorCalculator));
 
diff --git a/view/src/test/java/se/su/dsv/scipro/applicationperiod/AdminEditApplicationPeriodPageTest.java b/view/src/test/java/se/su/dsv/scipro/applicationperiod/AdminEditApplicationPeriodPageTest.java
index 7b68730909..a6bc599bd9 100644
--- a/view/src/test/java/se/su/dsv/scipro/applicationperiod/AdminEditApplicationPeriodPageTest.java
+++ b/view/src/test/java/se/su/dsv/scipro/applicationperiod/AdminEditApplicationPeriodPageTest.java
@@ -7,8 +7,10 @@ import java.io.Serializable;
 import java.time.LocalDate;
 import java.util.Collections;
 import java.util.List;
+import org.apache.wicket.Component;
 import org.apache.wicket.Page;
 import org.apache.wicket.feedback.FeedbackMessage;
+import org.apache.wicket.markup.html.form.CheckBoxMultipleChoice;
 import org.apache.wicket.markup.html.form.RequiredTextField;
 import org.apache.wicket.request.mapper.parameter.PageParameters;
 import org.apache.wicket.util.tester.FormTester;
@@ -36,6 +38,7 @@ public class AdminEditApplicationPeriodPageTest extends SciProTest {
     @BeforeEach
     public void setUp() throws Exception {
         bachelor = new ProjectType(DegreeType.BACHELOR, "Bachelor", "Bachelor");
+        bachelor.setId(8L);
         bachelor.addModule(ProjectModule.MATCH);
         when(projectTypeService.findWithModule(ProjectModule.MATCH)).thenReturn(Collections.singletonList(bachelor));
         startPage();
@@ -47,8 +50,12 @@ public class AdminEditApplicationPeriodPageTest extends SciProTest {
     }
 
     @Test
+    @SuppressWarnings("unchecked")
     public void contains_project_type_selection() {
-        tester.assertModelValue(path(FORM, PROJECT_TYPES), projectTypeService.findWithModule(ProjectModule.MATCH));
+        tester.assertComponent(path(FORM, PROJECT_TYPES), CheckBoxMultipleChoice.class);
+        Component component = tester.getComponentFromLastRenderedPage(path(FORM, PROJECT_TYPES));
+        CheckBoxMultipleChoice<ProjectType> choice = (CheckBoxMultipleChoice<ProjectType>) component;
+        Assertions.assertEquals(projectTypeService.findWithModule(ProjectModule.MATCH), choice.getChoices());
     }
 
     @Test
@@ -105,7 +112,7 @@ public class AdminEditApplicationPeriodPageTest extends SciProTest {
         );
         FormTester formTester = tester.newFormTester(FORM);
         fillInForm("Title", 0, 1, 2, formTester);
-        formTester.setValue(path(PROJECT_TYPES, 0, CHECKBOX), true);
+        formTester.setValue(path(PROJECT_TYPES), String.valueOf(bachelor.getId()));
         formTester.submit();
 
         ArgumentCaptor<ApplicationPeriod> captor = ArgumentCaptor.forClass(ApplicationPeriod.class);
@@ -113,12 +120,25 @@ public class AdminEditApplicationPeriodPageTest extends SciProTest {
         MatcherAssert.assertThat(captor.getValue().getProjectTypes(), Matchers.hasItem(bachelor));
     }
 
+    @Test
+    public void requires_at_least_one_project_type_to_be_selected() {
+        FormTester formTester = tester.newFormTester(FORM);
+        fillInFormWithValidValues(formTester);
+        formTester.setValue(path(PROJECT_TYPES), "");
+        formTester.submit();
+        tester.assertErrorMessages(tester.getLastRenderedPage().getString("projectTypes.Required"));
+    }
+
     private void submitForm(String title, int startDate, int endDate, int courseStartDate) {
         FormTester formTester = tester.newFormTester(FORM);
         fillInForm(title, startDate, endDate, courseStartDate, formTester);
         formTester.submit();
     }
 
+    private void fillInFormWithValidValues(FormTester formTester) {
+        fillInForm("Title", 0, 1, 2, formTester);
+    }
+
     private void fillInForm(String title, int startDate, int endDate, int courseStartDate, FormTester formTester) {
         formTester.setValue(TITLE, title);
         final LocalDate now = LocalDate.now();
@@ -126,6 +146,7 @@ public class AdminEditApplicationPeriodPageTest extends SciProTest {
         formTester.setValue(END_DATE, now.plusDays(endDate).toString());
         formTester.setValue(COURSE_START_DATE, now.plusDays(courseStartDate).toString());
         formTester.setValue("courseStartTime", "08:00");
+        formTester.setValue(PROJECT_TYPES, String.valueOf(bachelor.getId()));
     }
 
     private void startPage() {
diff --git a/view/src/test/java/se/su/dsv/scipro/grading/GradingReportPointsPanelTest.java b/view/src/test/java/se/su/dsv/scipro/grading/GradingReportPointsPanelTest.java
index caa5835e3f..f358d419e6 100644
--- a/view/src/test/java/se/su/dsv/scipro/grading/GradingReportPointsPanelTest.java
+++ b/view/src/test/java/se/su/dsv/scipro/grading/GradingReportPointsPanelTest.java
@@ -62,7 +62,7 @@ public class GradingReportPointsPanelTest extends SciProTest {
 
     private void startPanel() {
         panel = tester.startComponentInPage(
-            new GradingReportPointsPanel("id", Model.of(gradingReport), gradeCalculator)
+            new GradingReportPointsPanel("id", Model.of(gradingReport), () -> gradeCalculator)
         );
     }