diff --git a/.github/workflows/build-test.yaml b/.github/workflows/build-test.yaml
index 21cd2f39..dda3bc61 100644
--- a/.github/workflows/build-test.yaml
+++ b/.github/workflows/build-test.yaml
@@ -21,5 +21,5 @@ jobs:
           distribution: 'temurin'
           java-version: '21'
 
-      - name: Build with Gradle
-        run: ./gradlew build
\ No newline at end of file
+      - name: Run integration tests and build
+        run: ./gradlew integrationTest build
diff --git a/Dockerfile b/Dockerfile
index 5e2766d2..c7bf63dc 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,10 +1,10 @@
 FROM gradle:8-jdk21-alpine AS build
 COPY --chown=gradle:gradle . /home/gradle/src
 WORKDIR /home/gradle/src
-RUN gradle shadowjar --no-daemon
+RUN gradle integrationTest shadowjar --no-daemon
 
 FROM eclipse-temurin:21-jdk-alpine
 EXPOSE 8080:8080
 RUN mkdir /app
 COPY --from=build /home/gradle/src/build/libs/*.jar /app/matrikkel-bygning-egenregistrering.jar
-ENTRYPOINT ["java", "-Dlogback.configurationFile=logback-cloud.xml", "-jar","/app/matrikkel-bygning-egenregistrering.jar"]
\ No newline at end of file
+ENTRYPOINT ["java", "-Dlogback.configurationFile=logback-cloud.xml", "-jar","/app/matrikkel-bygning-egenregistrering.jar"]
diff --git a/README.md b/README.md
index b995e12f..3c2eb653 100644
--- a/README.md
+++ b/README.md
@@ -54,7 +54,7 @@ nødvendig rundt miljøkonfigurasjon, det skal ha sane defaults.
 
 ### Integrasjonstester
 
-Prosjektet inneholder noen integrasjonstester som ligger under [src/intTest](src/intTest). Testene bruker blant annet
+Prosjektet inneholder noen integrasjonstester som ligger under [src/intTest](src/integrationTest). Testene bruker blant annet
 testcontainers for å kjøre opp en database som bruke under testene.
 
 Testene er definert med en egen task som kan kjøres slik:
diff --git a/build.gradle.kts b/build.gradle.kts
index c7241b99..babef4c8 100644
--- a/build.gradle.kts
+++ b/build.gradle.kts
@@ -1,4 +1,6 @@
 import com.github.jengelman.gradle.plugins.shadow.tasks.ShadowJar
+import org.gradle.api.tasks.testing.logging.TestExceptionFormat
+import org.gradle.api.tasks.testing.logging.TestLogEvent.*
 
 plugins {
     kotlin("jvm").version(libs.versions.kotlinVersion)
@@ -6,6 +8,8 @@ plugins {
 
     alias(libs.plugins.ktor)
     alias(libs.plugins.shadow)
+
+    `jvm-test-suite`
 }
 
 allprojects {
@@ -17,17 +21,6 @@ application {
     mainClass.set("no.kartverket.matrikkel.bygning.ApplicationKt")
 }
 
-sourceSets {
-    create("intTest") {
-        compileClasspath += sourceSets.main.get().output
-        runtimeClasspath += sourceSets.main.get().output
-    }
-}
-
-val intTestImplementation: Configuration by configurations.getting {
-    extendsFrom(configurations.implementation.get())
-}
-
 dependencies {
     implementation(project(":matrikkel-api"))
 
@@ -59,14 +52,6 @@ dependencies {
 
     // OpenAPI
     implementation(libs.kompendium.core)
-
-    // Integration tests
-    intTestImplementation(libs.kotlin.test)
-    intTestImplementation(libs.ktor.server.tests)
-    intTestImplementation(libs.ktor.client.content.negotation)
-
-    intTestImplementation(libs.assertj)
-    intTestImplementation(libs.testcontainers.postgresql)
 }
 
 tasks {
@@ -74,21 +59,37 @@ tasks {
         mergeServiceFiles()
         archiveBaseName.set("${project.name}-all")
     }
+}
 
-    check {
-        dependsOn(integrationTest)
+tasks.withType<Test> {
+    testLogging {
+        showCauses = true
+        showExceptions = true
+        exceptionFormat = TestExceptionFormat.FULL
+        events(PASSED, SKIPPED, FAILED)
     }
 }
 
-val integrationTest = task<Test>("integrationTest") {
-    description = "Runs integration tests"
-    group = "verification"
+@Suppress("UnstableApiUsage")
+testing {
+    suites {
+        withType<JvmTestSuite> {
+            useJUnitJupiter()
+        }
 
-    testClassesDirs = sourceSets["intTest"].output.classesDirs
-    classpath = sourceSets["intTest"].runtimeClasspath
-    shouldRunAfter("test")
+        register<JvmTestSuite>("integrationTest") {
+            dependencies {
+                implementation(project())
 
-    testLogging {
-        events("passed", "skipped", "failed")
+                implementation(libs.ktor.serialization.kotlinx)
+
+                implementation(libs.kotlin.test)
+                implementation(libs.ktor.server.tests)
+                implementation(libs.ktor.client.content.negotation)
+
+                implementation(libs.assertj)
+                implementation(libs.testcontainers.postgresql)
+            }
+        }
     }
 }
diff --git a/gradle/libs.versions.toml b/gradle/libs.versions.toml
index b6404468..5de2f219 100644
--- a/gradle/libs.versions.toml
+++ b/gradle/libs.versions.toml
@@ -35,7 +35,7 @@ logstash-encoder = { group = "net.logstash.logback", name = "logstash-logback-en
 logback-classic = { group = "ch.qos.logback", name = "logback-classic", version.ref = "logbackVersion" }
 jackson-databind = { group = "com.fasterxml.jackson.core", name = "jackson-databind", version.ref = "jacksonVersion" }
 postgres = { group = "org.postgresql", name = "postgresql", version.ref = "postgresVersion" }
-kotlin-test = { group = "org.jetbrains.kotlin", name = "kotlin-test-junit", version.ref = "kotlinVersion" }
+kotlin-test = { group = "org.jetbrains.kotlin", name = "kotlin-test-junit5", version.ref = "kotlinVersion" }
 kompendium-core = { group = "io.bkbn", name = "kompendium-core", version.ref = "kompendiumVersion" }
 kotlinx-datetime = { group = "org.jetbrains.kotlinx", name = "kotlinx-datetime", version.ref = "kotlinxDatetimeVersion" }
 
diff --git a/src/intTest/kotlin/no/kartverket/matrikkel/bygning/InternalRouteTest.kt b/src/integrationTest/kotlin/no/kartverket/matrikkel/bygning/InternalRouteTest.kt
similarity index 95%
rename from src/intTest/kotlin/no/kartverket/matrikkel/bygning/InternalRouteTest.kt
rename to src/integrationTest/kotlin/no/kartverket/matrikkel/bygning/InternalRouteTest.kt
index 7be5304b..bcafef31 100644
--- a/src/intTest/kotlin/no/kartverket/matrikkel/bygning/InternalRouteTest.kt
+++ b/src/integrationTest/kotlin/no/kartverket/matrikkel/bygning/InternalRouteTest.kt
@@ -4,7 +4,7 @@ import io.ktor.client.request.*
 import io.ktor.http.*
 import io.ktor.server.testing.*
 import org.assertj.core.api.Assertions.assertThat
-import org.junit.Test
+import org.junit.jupiter.api.Test
 
 class InternalRouteTest : TestWithDb() {
 
diff --git a/src/intTest/kotlin/no/kartverket/matrikkel/bygning/TestWithDb.kt b/src/integrationTest/kotlin/no/kartverket/matrikkel/bygning/TestWithDb.kt
similarity index 93%
rename from src/intTest/kotlin/no/kartverket/matrikkel/bygning/TestWithDb.kt
rename to src/integrationTest/kotlin/no/kartverket/matrikkel/bygning/TestWithDb.kt
index 89fa6779..e4fb16e6 100644
--- a/src/intTest/kotlin/no/kartverket/matrikkel/bygning/TestWithDb.kt
+++ b/src/integrationTest/kotlin/no/kartverket/matrikkel/bygning/TestWithDb.kt
@@ -5,8 +5,8 @@ import io.ktor.client.plugins.contentnegotiation.*
 import io.ktor.serialization.kotlinx.json.*
 import io.ktor.server.config.*
 import io.ktor.server.testing.*
-import org.junit.AfterClass
-import org.junit.BeforeClass
+import org.junit.jupiter.api.AfterAll
+import org.junit.jupiter.api.BeforeAll
 import org.testcontainers.containers.PostgreSQLContainer
 
 abstract class TestWithDb {
@@ -14,14 +14,14 @@ abstract class TestWithDb {
     companion object {
         private val postgresSQLContainer = PostgreSQLContainer("postgres:15-alpine")
 
-        @BeforeClass
+        @BeforeAll
         @JvmStatic
         fun setUp() {
             postgresSQLContainer.withDatabaseName("bygning")
             postgresSQLContainer.start()
         }
 
-        @AfterClass
+        @AfterAll
         @JvmStatic
         fun tearDown() {
             postgresSQLContainer.stop()
diff --git a/src/intTest/kotlin/no/kartverket/matrikkel/bygning/v1/BygningRouteTest.kt b/src/integrationTest/kotlin/no/kartverket/matrikkel/bygning/v1/BygningRouteTest.kt
similarity index 97%
rename from src/intTest/kotlin/no/kartverket/matrikkel/bygning/v1/BygningRouteTest.kt
rename to src/integrationTest/kotlin/no/kartverket/matrikkel/bygning/v1/BygningRouteTest.kt
index 4632a05e..66ad9150 100644
--- a/src/intTest/kotlin/no/kartverket/matrikkel/bygning/v1/BygningRouteTest.kt
+++ b/src/integrationTest/kotlin/no/kartverket/matrikkel/bygning/v1/BygningRouteTest.kt
@@ -7,7 +7,7 @@ import io.ktor.server.testing.*
 import no.kartverket.matrikkel.bygning.TestWithDb
 import no.kartverket.matrikkel.bygning.models.Bygning
 import org.assertj.core.api.Assertions.assertThat
-import org.junit.Test
+import org.junit.jupiter.api.Test
 
 class BygningRouteTest : TestWithDb() {