diff --git a/cloud.ganttproject.colloboque/build.gradle.kts b/cloud.ganttproject.colloboque/build.gradle.kts
index 949d482361..e5ee9f1bd7 100644
--- a/cloud.ganttproject.colloboque/build.gradle.kts
+++ b/cloud.ganttproject.colloboque/build.gradle.kts
@@ -44,6 +44,7 @@ dependencies {
     implementation(kotlin("reflect", version = kotlinVersion))
     implementation("org.jetbrains.kotlinx:kotlinx-coroutines-core:1.6.4")
     implementation("org.jooq:jooq:3.19.1")
+    implementation("com.h2database:h2:2.1.214")
     implementation("org.slf4j:slf4j-api:1.7.36")
     implementation("com.github.ajalt.clikt:clikt:4.+")
     implementation("org.nanohttpd:nanohttpd:2.3.1")
@@ -54,7 +55,6 @@ dependencies {
     implementation(files("lib/eclipsito.jar"))
 
     testImplementation("org.junit.jupiter:junit-jupiter-api:5.9.0")
-    testImplementation("com.h2database:h2:2.1.214")
     testRuntimeOnly("org.junit.jupiter:junit-jupiter-engine:5.9.0")
 }
 
diff --git a/cloud.ganttproject.colloboque/src/main/kotlin/cloud/ganttproject/colloboque/ProjectFileUpdater.kt b/cloud.ganttproject.colloboque/src/main/kotlin/cloud/ganttproject/colloboque/ProjectFileUpdater.kt
index 6a6e8ff20d..a6c8d33fe5 100644
--- a/cloud.ganttproject.colloboque/src/main/kotlin/cloud/ganttproject/colloboque/ProjectFileUpdater.kt
+++ b/cloud.ganttproject.colloboque/src/main/kotlin/cloud/ganttproject/colloboque/ProjectFileUpdater.kt
@@ -25,12 +25,18 @@ import net.sourceforge.ganttproject.TaskManagerConfigImpl
 import net.sourceforge.ganttproject.io.GanttXMLSaver
 import net.sourceforge.ganttproject.resource.HumanResourceManager
 import net.sourceforge.ganttproject.roles.RoleManager
-import net.sourceforge.ganttproject.storage.LazyProjectDatabaseProxy
-import net.sourceforge.ganttproject.storage.SqlProjectDatabaseImpl
-import net.sourceforge.ganttproject.storage.XlogRecord
+import net.sourceforge.ganttproject.storage.*
 import net.sourceforge.ganttproject.task.*
+import org.h2.jdbcx.JdbcDataSource
 import java.io.ByteArrayOutputStream
 
+private var databaseCounter: Long = 0
+private fun createInMemoryDatabase(): ProjectDatabase {
+  val dataSource = JdbcDataSource()
+  dataSource.setURL("jdbc:h2:mem:update${databaseCounter++};DB_CLOSE_DELAY=-1;DATABASE_TO_LOWER=true")
+  return SqlProjectDatabaseImpl(dataSource)
+}
+
 /**
  * This function applies the `updates` to the contents of `projectXml` and returns the updated XML as a String.
  */
@@ -42,9 +48,10 @@ fun updateProjectXml(projectXml: String, updates: XlogRecord): String {
   )
   val taskManagerConfig = TaskManagerConfigImpl(humanResourceManager, calendar)
   val taskManager = TaskManagerImpl(null, taskManagerConfig)
-  val projectDatabase = LazyProjectDatabaseProxy(databaseFactory = {
-    SqlProjectDatabaseImpl.createInMemoryDatabase()
-  }, taskManager = {taskManager}).also {
+  val projectDatabase = LazyProjectDatabaseProxy(
+    databaseFactory = {  createInMemoryDatabase() },
+    taskManager = {taskManager}
+  ).also {
     it.startLog("0")
   }
   val project = GanttProjectImpl(taskManager, projectDatabase)
diff --git a/cloud.ganttproject.colloboque/src/test/kotlin/cloud/ganttproject/colloboque/ProjectFileUpdaterTest.kt b/cloud.ganttproject.colloboque/src/test/kotlin/cloud/ganttproject/colloboque/ProjectFileUpdaterTest.kt
index 831f406029..72baeb5781 100644
--- a/cloud.ganttproject.colloboque/src/test/kotlin/cloud/ganttproject/colloboque/ProjectFileUpdaterTest.kt
+++ b/cloud.ganttproject.colloboque/src/test/kotlin/cloud/ganttproject/colloboque/ProjectFileUpdaterTest.kt
@@ -33,7 +33,7 @@ class ProjectFileUpdaterTest {
   }
 
   @Test fun `empty xlog`() {
-    assertEquals(PROJECT_XML_TEMPLATE, ProjectFileUpdater().applyXlog(PROJECT_XML_TEMPLATE, XlogRecord(emptyList())))
+    assertEquals(PROJECT_XML_TEMPLATE, updateProjectXml(PROJECT_XML_TEMPLATE, XlogRecord(emptyList())))
   }
 
   @Test fun `apply task name change`() {