@Nested classes with @Tag annotations provides a maintainable, organized, and highly configurable tests out applications.
We can group tests related to a specific state or feature within their own inner class.
Example
Using @Tag on nested test classes
package com.logicbig.example;
import org.junit.jupiter.api.Nested;
import org.junit.jupiter.api.Tag;
import org.junit.jupiter.api.Test;
import static org.junit.jupiter.api.Assertions.assertEquals;
import static org.junit.jupiter.api.Assertions.assertTrue;
@Tag("integration")
class MyIntegrationTest {
@Nested
@Tag("dbTest")
class MyDbTest {
@Test
@Tag("staging")
void stagingTest() {
assertEquals(2, 1 + 1);
}
@Test
@Tag("transaction")
void dbTransactionTest() {
assertTrue(true);
}
@Test
void dbConnectionTest() {
assertTrue(true);
}
}
@Nested
@Tag("calc-test")
class CalcTest {
@Test
void factorialTest() {
assertTrue(true);
}
@Test
void sumTest() {
assertTrue(true);
}
}
}
Not using any filter
$ mvn test [INFO] Scanning for projects... [INFO] [INFO] ----------< com.logicbig.example:junit-5-tag-on-nested-class >---------- [INFO] Building junit-5-tag-on-nested-class 1.0-SNAPSHOT [INFO] from pom.xml [INFO] --------------------------------[ jar ]--------------------------------- [INFO] [INFO] --- resources:3.3.1:resources (default-resources) @ junit-5-tag-on-nested-class --- [WARNING] Using platform encoding (Cp1252 actually) to copy filtered resources, i.e. build is platform dependent! [INFO] skip non existing resourceDirectory D:\example-projects\junit-5\junit-5-tagging-and-filtering\junit-5-tag-on-nested-class\src\main\resources [INFO] [INFO] --- compiler:3.11.0:compile (default-compile) @ junit-5-tag-on-nested-class --- [INFO] No sources to compile [INFO] [INFO] --- resources:3.3.1:testResources (default-testResources) @ junit-5-tag-on-nested-class --- [WARNING] Using platform encoding (Cp1252 actually) to copy filtered resources, i.e. build is platform dependent! [INFO] skip non existing resourceDirectory D:\example-projects\junit-5\junit-5-tagging-and-filtering\junit-5-tag-on-nested-class\src\test\resources [INFO] [INFO] --- compiler:3.11.0:testCompile (default-testCompile) @ junit-5-tag-on-nested-class --- [INFO] Nothing to compile - all classes are up to date [INFO] [INFO] --- surefire:3.5.0:test (default-test) @ junit-5-tag-on-nested-class --- [INFO] Using auto detected provider org.apache.maven.surefire.junitplatform.JUnitPlatformProvider [INFO] [INFO] ------------------------------------------------------- [INFO] T E S T S [INFO] ------------------------------------------------------- [INFO] +--com.logicbig.example.ClassLevelTagUsageTest - 0.126 ss [INFO] | +-- [OK] sumTest - 0.071 ss [INFO] | '-- [OK] primeNumberTest - 0.011 ss [INFO] +--.--com.logicbig.example.MyIntegrationTest$CalcTest - 0.004 ss [INFO] | | +-- [OK] sumTest - 0.002 ss [INFO] | | '-- [OK] factorialTest - 0.002 ss [INFO] +-----com.logicbig.example.MyIntegrationTest$MyDbTest - 0.004 ss [INFO] | +-- [OK] dbConnectionTest - 0.002 ss [INFO] | +-- [OK] dbTransactionTest - 0.002 ss [INFO] | '-- [OK] stagingTest - 0 ss [INFO] [INFO] Results: [INFO] [INFO] Tests run: 7, Failures: 0, Errors: 0, Skipped: 0 [INFO] [INFO] ------------------------------------------------------------------------ [INFO] BUILD SUCCESS [INFO] ------------------------------------------------------------------------ [INFO] Total time: 3.528 s [INFO] Finished at: 2025-12-15T09:40:24+08:00 [INFO] ------------------------------------------------------------------------
Run only DB-related nested tests
$ mvn test -Dgroups="integration & dbTest" [INFO] Scanning for projects... [INFO] [INFO] ----------< com.logicbig.example:junit-5-tag-on-nested-class >---------- [INFO] Building junit-5-tag-on-nested-class 1.0-SNAPSHOT [INFO] from pom.xml [INFO] --------------------------------[ jar ]--------------------------------- [INFO] [INFO] --- resources:3.3.1:resources (default-resources) @ junit-5-tag-on-nested-class --- [WARNING] Using platform encoding (Cp1252 actually) to copy filtered resources, i.e. build is platform dependent! [INFO] skip non existing resourceDirectory D:\example-projects\junit-5\junit-5-tagging-and-filtering\junit-5-tag-on-nested-class\src\main\resources [INFO] [INFO] --- compiler:3.11.0:compile (default-compile) @ junit-5-tag-on-nested-class --- [INFO] No sources to compile [INFO] [INFO] --- resources:3.3.1:testResources (default-testResources) @ junit-5-tag-on-nested-class --- [WARNING] Using platform encoding (Cp1252 actually) to copy filtered resources, i.e. build is platform dependent! [INFO] skip non existing resourceDirectory D:\example-projects\junit-5\junit-5-tagging-and-filtering\junit-5-tag-on-nested-class\src\test\resources [INFO] [INFO] --- compiler:3.11.0:testCompile (default-testCompile) @ junit-5-tag-on-nested-class --- [INFO] Nothing to compile - all classes are up to date [INFO] [INFO] --- surefire:3.5.0:test (default-test) @ junit-5-tag-on-nested-class --- [INFO] Using auto detected provider org.apache.maven.surefire.junitplatform.JUnitPlatformProvider [INFO] [INFO] ------------------------------------------------------- [INFO] T E S T S [INFO] ------------------------------------------------------- [INFO] +-----com.logicbig.example.MyIntegrationTest$MyDbTest - 0.085 ss [INFO] | +-- [OK] dbConnectionTest - 0.036 ss [INFO] | +-- [OK] dbTransactionTest - 0 ss [INFO] | '-- [OK] stagingTest - 0.002 ss [INFO] [INFO] Results: [INFO] [INFO] Tests run: 3, Failures: 0, Errors: 0, Skipped: 0 [INFO] [INFO] ------------------------------------------------------------------------ [INFO] BUILD SUCCESS [INFO] ------------------------------------------------------------------------ [INFO] Total time: 3.153 s [INFO] Finished at: 2025-12-15T09:40:37+08:00 [INFO] ------------------------------------------------------------------------
Run staging tests within nested DB class
$ mvn test -Dgroups="integration & dbTest & staging" [INFO] Scanning for projects... [INFO] [INFO] ----------< com.logicbig.example:junit-5-tag-on-nested-class >---------- [INFO] Building junit-5-tag-on-nested-class 1.0-SNAPSHOT [INFO] from pom.xml [INFO] --------------------------------[ jar ]--------------------------------- [INFO] [INFO] --- resources:3.3.1:resources (default-resources) @ junit-5-tag-on-nested-class --- [WARNING] Using platform encoding (Cp1252 actually) to copy filtered resources, i.e. build is platform dependent! [INFO] skip non existing resourceDirectory D:\example-projects\junit-5\junit-5-tagging-and-filtering\junit-5-tag-on-nested-class\src\main\resources [INFO] [INFO] --- compiler:3.11.0:compile (default-compile) @ junit-5-tag-on-nested-class --- [INFO] No sources to compile [INFO] [INFO] --- resources:3.3.1:testResources (default-testResources) @ junit-5-tag-on-nested-class --- [WARNING] Using platform encoding (Cp1252 actually) to copy filtered resources, i.e. build is platform dependent! [INFO] skip non existing resourceDirectory D:\example-projects\junit-5\junit-5-tagging-and-filtering\junit-5-tag-on-nested-class\src\test\resources [INFO] [INFO] --- compiler:3.11.0:testCompile (default-testCompile) @ junit-5-tag-on-nested-class --- [INFO] Nothing to compile - all classes are up to date [INFO] [INFO] --- surefire:3.5.0:test (default-test) @ junit-5-tag-on-nested-class --- [INFO] Using auto detected provider org.apache.maven.surefire.junitplatform.JUnitPlatformProvider [INFO] [INFO] ------------------------------------------------------- [INFO] T E S T S [INFO] ------------------------------------------------------- [INFO] +-----com.logicbig.example.MyIntegrationTest$MyDbTest - 0.124 ss [INFO] | '-- [OK] stagingTest - 0.069 ss [INFO] [INFO] Results: [INFO] [INFO] Tests run: 1, Failures: 0, Errors: 0, Skipped: 0 [INFO] [INFO] ------------------------------------------------------------------------ [INFO] BUILD SUCCESS [INFO] ------------------------------------------------------------------------ [INFO] Total time: 3.101 s [INFO] Finished at: 2025-12-15T09:40:52+08:00 [INFO] ------------------------------------------------------------------------
Run calculation tests excluding DB tests
$ mvn test -Dgroups="integration & calc-test" [INFO] Scanning for projects... [INFO] [INFO] ----------< com.logicbig.example:junit-5-tag-on-nested-class >---------- [INFO] Building junit-5-tag-on-nested-class 1.0-SNAPSHOT [INFO] from pom.xml [INFO] --------------------------------[ jar ]--------------------------------- [INFO] [INFO] --- resources:3.3.1:resources (default-resources) @ junit-5-tag-on-nested-class --- [WARNING] Using platform encoding (Cp1252 actually) to copy filtered resources, i.e. build is platform dependent! [INFO] skip non existing resourceDirectory D:\example-projects\junit-5\junit-5-tagging-and-filtering\junit-5-tag-on-nested-class\src\main\resources [INFO] [INFO] --- compiler:3.11.0:compile (default-compile) @ junit-5-tag-on-nested-class --- [INFO] No sources to compile [INFO] [INFO] --- resources:3.3.1:testResources (default-testResources) @ junit-5-tag-on-nested-class --- [WARNING] Using platform encoding (Cp1252 actually) to copy filtered resources, i.e. build is platform dependent! [INFO] skip non existing resourceDirectory D:\example-projects\junit-5\junit-5-tagging-and-filtering\junit-5-tag-on-nested-class\src\test\resources [INFO] [INFO] --- compiler:3.11.0:testCompile (default-testCompile) @ junit-5-tag-on-nested-class --- [INFO] Nothing to compile - all classes are up to date [INFO] [INFO] --- surefire:3.5.0:test (default-test) @ junit-5-tag-on-nested-class --- [INFO] Using auto detected provider org.apache.maven.surefire.junitplatform.JUnitPlatformProvider [INFO] [INFO] ------------------------------------------------------- [INFO] T E S T S [INFO] ------------------------------------------------------- [INFO] +-----com.logicbig.example.MyIntegrationTest$CalcTest - 0.071 ss [INFO] | +-- [OK] sumTest - 0.026 ss [INFO] | '-- [OK] factorialTest - 0.006 ss [INFO] [INFO] Results: [INFO] [INFO] Tests run: 2, Failures: 0, Errors: 0, Skipped: 0 [INFO] [INFO] ------------------------------------------------------------------------ [INFO] BUILD SUCCESS [INFO] ------------------------------------------------------------------------ [INFO] Total time: 3.075 s [INFO] Finished at: 2025-12-15T09:41:01+08:00 [INFO] ------------------------------------------------------------------------
Run only transaction tests in nested DB class
$ mvn test -Dgroups="integration & dbTest & transaction" [INFO] Scanning for projects... [INFO] [INFO] ----------< com.logicbig.example:junit-5-tag-on-nested-class >---------- [INFO] Building junit-5-tag-on-nested-class 1.0-SNAPSHOT [INFO] from pom.xml [INFO] --------------------------------[ jar ]--------------------------------- [INFO] [INFO] --- resources:3.3.1:resources (default-resources) @ junit-5-tag-on-nested-class --- [WARNING] Using platform encoding (Cp1252 actually) to copy filtered resources, i.e. build is platform dependent! [INFO] skip non existing resourceDirectory D:\example-projects\junit-5\junit-5-tagging-and-filtering\junit-5-tag-on-nested-class\src\main\resources [INFO] [INFO] --- compiler:3.11.0:compile (default-compile) @ junit-5-tag-on-nested-class --- [INFO] No sources to compile [INFO] [INFO] --- resources:3.3.1:testResources (default-testResources) @ junit-5-tag-on-nested-class --- [WARNING] Using platform encoding (Cp1252 actually) to copy filtered resources, i.e. build is platform dependent! [INFO] skip non existing resourceDirectory D:\example-projects\junit-5\junit-5-tagging-and-filtering\junit-5-tag-on-nested-class\src\test\resources [INFO] [INFO] --- compiler:3.11.0:testCompile (default-testCompile) @ junit-5-tag-on-nested-class --- [INFO] Nothing to compile - all classes are up to date [INFO] [INFO] --- surefire:3.5.0:test (default-test) @ junit-5-tag-on-nested-class --- [INFO] Using auto detected provider org.apache.maven.surefire.junitplatform.JUnitPlatformProvider [INFO] [INFO] ------------------------------------------------------- [INFO] T E S T S [INFO] ------------------------------------------------------- [INFO] +-----com.logicbig.example.MyIntegrationTest$MyDbTest - 0.103 ss [INFO] | '-- [OK] dbTransactionTest - 0.047 ss [INFO] [INFO] Results: [INFO] [INFO] Tests run: 1, Failures: 0, Errors: 0, Skipped: 0 [INFO] [INFO] ------------------------------------------------------------------------ [INFO] BUILD SUCCESS [INFO] ------------------------------------------------------------------------ [INFO] Total time: 4.121 s [INFO] Finished at: 2025-12-15T06:24:09+08:00 [INFO] ------------------------------------------------------------------------
Run all integration tests except calculation tests
$ mvn test -DexcludedGroups=calc-test [INFO] Scanning for projects... [INFO] [INFO] ----------< com.logicbig.example:junit-5-tag-on-nested-class >---------- [INFO] Building junit-5-tag-on-nested-class 1.0-SNAPSHOT [INFO] from pom.xml [INFO] --------------------------------[ jar ]--------------------------------- [INFO] [INFO] --- resources:3.3.1:resources (default-resources) @ junit-5-tag-on-nested-class --- [WARNING] Using platform encoding (Cp1252 actually) to copy filtered resources, i.e. build is platform dependent! [INFO] skip non existing resourceDirectory D:\example-projects\junit-5\junit-5-tagging-and-filtering\junit-5-tag-on-nested-class\src\main\resources [INFO] [INFO] --- compiler:3.11.0:compile (default-compile) @ junit-5-tag-on-nested-class --- [INFO] No sources to compile [INFO] [INFO] --- resources:3.3.1:testResources (default-testResources) @ junit-5-tag-on-nested-class --- [WARNING] Using platform encoding (Cp1252 actually) to copy filtered resources, i.e. build is platform dependent! [INFO] skip non existing resourceDirectory D:\example-projects\junit-5\junit-5-tagging-and-filtering\junit-5-tag-on-nested-class\src\test\resources [INFO] [INFO] --- compiler:3.11.0:testCompile (default-testCompile) @ junit-5-tag-on-nested-class --- [INFO] Nothing to compile - all classes are up to date [INFO] [INFO] --- surefire:3.5.0:test (default-test) @ junit-5-tag-on-nested-class --- [INFO] Using auto detected provider org.apache.maven.surefire.junitplatform.JUnitPlatformProvider [INFO] [INFO] ------------------------------------------------------- [INFO] T E S T S [INFO] ------------------------------------------------------- [INFO] +-----com.logicbig.example.MyIntegrationTest$MyDbTest - 0.073 ss [INFO] | +-- [OK] dbConnectionTest - 0.030 ss [INFO] | +-- [OK] dbTransactionTest - 0.007 ss [INFO] | '-- [OK] stagingTest - 0.002 ss [INFO] [INFO] Results: [INFO] [INFO] Tests run: 3, Failures: 0, Errors: 0, Skipped: 0 [INFO] [INFO] ------------------------------------------------------------------------ [INFO] BUILD SUCCESS [INFO] ------------------------------------------------------------------------ [INFO] Total time: 2.548 s [INFO] Finished at: 2025-12-15T06:24:14+08:00 [INFO] ------------------------------------------------------------------------
Example ProjectDependencies and Technologies Used: - junit-jupiter-engine 6.0.1 (Module "junit-jupiter-engine" of JUnit)
Version Compatibility: 5.0.0 - 6.0.1 Version compatibilities of junit-jupiter-engine with this example:
- 5.0.0
- 5.0.1
- 5.0.2
- 5.0.3
- 5.1.0
- 5.1.1
- 5.2.0
- 5.3.0
- 5.3.1
- 5.3.2
- 5.4.0
- 5.4.1
- 5.4.2
- 5.5.0
- 5.5.1
- 5.5.2
- 5.6.0
- 5.6.1
- 5.6.2
- 5.6.3
- 5.7.0
- 5.7.1
- 5.7.2
- 5.8.0
- 5.8.1
- 5.8.2
- 5.9.0
- 5.9.1
- 5.9.2
- 5.9.3
- 5.10.0
- 5.10.1
- 5.10.2
- 5.10.3
- 5.10.4
- 5.10.5
- 5.11.0
- 5.11.1
- 5.11.2
- 5.11.3
- 5.11.4
- 5.12.0
- 5.12.1
- 5.12.2
- 5.13.0
- 5.13.1
- 5.13.2
- 5.13.3
- 5.13.4
- 5.14.0
- 5.14.1
- 6.0.0
- 6.0.1
Versions in green have been tested.
- JDK 25
- Maven 3.9.11
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