diff --git a/pom.xml b/pom.xml
index a6c4932..8562394 100644
--- a/pom.xml
+++ b/pom.xml
@@ -91,16 +91,28 @@
 			<version>1.2.32</version>
 		</dependency>
 
+		<!--	TEST dependencies	-->
 		<dependency>
 			<groupId>org.springframework.boot</groupId>
 			<artifactId>spring-boot-starter-test</artifactId>
 			<scope>test</scope>
-			<exclusions>
-				<exclusion>
-					<groupId>org.junit.vintage</groupId>
-					<artifactId>junit-vintage-engine</artifactId>
-				</exclusion>
-			</exclusions>
+		</dependency>
+		<dependency>
+			<groupId>org.spockframework</groupId>
+			<artifactId>spock-core</artifactId>
+			<version>1.3-groovy-2.5</version>
+			<scope>test</scope>
+		</dependency>
+		<dependency>
+			<groupId>org.spockframework</groupId>
+			<artifactId>spock-spring</artifactId>
+			<version>1.3-groovy-2.5</version>
+			<scope>test</scope>
+		</dependency>
+		<dependency>
+			<groupId>io.rest-assured</groupId>
+			<artifactId>rest-assured</artifactId>
+			<scope>test</scope>
 		</dependency>
 		<dependency>
 			<groupId>com.tngtech.archunit</groupId>
@@ -108,10 +120,7 @@
 			<version>0.13.1</version>
 			<scope>test</scope>
 		</dependency>
-		<dependency>
-			<groupId>io.rest-assured</groupId>
-			<artifactId>rest-assured</artifactId>
-		</dependency>
+
 	</dependencies>
 
 	<build>
@@ -144,8 +153,25 @@
 				<artifactId>maven-surefire-plugin</artifactId>
 				<configuration>
 					<reportsDirectory>${surefire.and.failsafe.report.dir}</reportsDirectory>
+					<includes>
+						<include>**/*Spec.java</include>
+						<include>**/*Test.java</include>
+					</includes>
 				</configuration>
 			</plugin>
+			<plugin>
+				<groupId>org.codehaus.gmavenplus</groupId>
+				<artifactId>gmavenplus-plugin</artifactId>
+				<version>1.10.0</version>
+				<executions>
+					<execution>
+						<goals>
+							<goal>addTestSources</goal>
+							<goal>compileTests</goal>
+						</goals>
+					</execution>
+				</executions>
+			</plugin>
 			<plugin>
 				<groupId>org.jacoco</groupId>
 				<artifactId>jacoco-maven-plugin</artifactId>
@@ -263,6 +289,7 @@
 				<sonar.sources>.</sonar.sources>
 				<sonar.inclusions>src/main/java/**,src/main/resources/**</sonar.inclusions>
 				<sonar.exclusions>${code.coverage.exclusions}</sonar.exclusions>
+				<sonat.tests>src/test/groovy,src/test/java</sonat.tests>
 				<sonar.projectKey>wkrzywiec_library-hexagonal</sonar.projectKey>
 				<sonar.organization>wkrzywiec</sonar.organization>
 				<sonar.coverage.jacoco.xmlReportPaths>target/site/jacoco/jacoco.xml,target/site/jacoco-it/jacoco.xml</sonar.coverage.jacoco.xmlReportPaths>
diff --git a/src/test/groovy/io/wkrzywiec/hexagonal/library/domain/borrowing/BorrowingFacadeSpec.groovy b/src/test/groovy/io/wkrzywiec/hexagonal/library/domain/borrowing/BorrowingFacadeSpec.groovy
new file mode 100644
index 0000000..eaa2406
--- /dev/null
+++ b/src/test/groovy/io/wkrzywiec/hexagonal/library/domain/borrowing/BorrowingFacadeSpec.groovy
@@ -0,0 +1,32 @@
+package io.wkrzywiec.hexagonal.library.domain.borrowing
+
+import io.wkrzywiec.hexagonal.library.domain.borrowing.core.BorrowingFacade
+import io.wkrzywiec.hexagonal.library.domain.borrowing.core.model.AvailableBook
+import io.wkrzywiec.hexagonal.library.domain.borrowing.core.model.MakeBookAvailableCommand
+import io.wkrzywiec.hexagonal.library.domain.borrowing.core.ports.outgoing.BorrowingEventPublisher
+import spock.lang.Specification
+
+class BorrowingFacadeSpec extends Specification {
+
+    private BorrowingFacade facade;
+    private InMemoryBorrowingDatabase database;
+    private BorrowingEventPublisher eventPublisher;
+
+    def setup(){
+        database = new InMemoryBorrowingDatabase();
+        eventPublisher = new BorrowingEventPublisherFake();
+        facade = new BorrowingFacade(database, eventPublisher);
+    }
+
+    def "Make a book available"(){
+
+        given: "prepare a command"
+        def command = new MakeBookAvailableCommand(100L)
+
+        when: "receive MakeBookAvailableCommand"
+        facade.handle(command)
+
+        then: "check database to have this book as available"
+        database.availableBooks[100L].idAsLong == new AvailableBook(100L).idAsLong
+    }
+}
\ No newline at end of file