diff --git a/core-tests/e2e-tests/spring/spring-rest-bb/src/main/kotlin/com/foo/rest/examples/bb/jsonmergepatch/BBJsonMergePatchApplication.kt b/core-tests/e2e-tests/spring/spring-rest-bb/src/main/kotlin/com/foo/rest/examples/bb/jsonmergepatch/BBJsonMergePatchApplication.kt
new file mode 100644
index 0000000000..4a84db3add
--- /dev/null
+++ b/core-tests/e2e-tests/spring/spring-rest-bb/src/main/kotlin/com/foo/rest/examples/bb/jsonmergepatch/BBJsonMergePatchApplication.kt
@@ -0,0 +1,64 @@
+package com.foo.rest.examples.bb.jsonmergepatch
+
+import com.fasterxml.jackson.databind.JsonNode
+import com.fasterxml.jackson.databind.ObjectMapper
+import io.swagger.v3.oas.annotations.media.Schema
+import org.springframework.boot.SpringApplication
+import org.springframework.boot.autoconfigure.SpringBootApplication
+import org.springframework.boot.autoconfigure.security.servlet.SecurityAutoConfiguration
+import org.evomaster.e2etests.utils.CoveredTargets
+import org.springframework.http.ResponseEntity
+import org.springframework.web.bind.annotation.*
+import java.util.Optional
+
+@SpringBootApplication(exclude = [SecurityAutoConfiguration::class])
+@RestController
+@RequestMapping("/api/jsonmergepatch")
+open class BBJsonMergePatchApplication {
+
+    companion object {
+        @JvmStatic
+        fun main(args: Array<String>) {
+            SpringApplication.run(BBJsonMergePatchApplication::class.java, *args)
+        }
+    }
+
+
+
+    @PatchMapping("/", consumes = ["application/merge-patch+json"])
+    fun patchPet(@RequestBody dto: BBJsonMergePatchDto): ResponseEntity<String> {
+
+        if(dto.name == null && dto.x == null){
+            CoveredTargets.cover("BOTH_UNDEFINED")
+            return ResponseEntity.status(400).build()
+        }
+        if(dto.name == null || dto.x == null){
+            CoveredTargets.cover("ONE_UNDEFINED")
+            return ResponseEntity.status(401).build()
+        }
+        //we use different status codes just to make sure tests end up in final test suite
+        if(dto.name.isEmpty && dto.x.isEmpty){
+            CoveredTargets.cover("BOTH_NULL")
+            return ResponseEntity.status(403).build()
+        }
+        if(!dto.name.isEmpty && !dto.x.isEmpty){
+            CoveredTargets.cover("BOTH_PRESENT")
+            return ResponseEntity.status(200).build()
+        }
+        if(dto.name.isEmpty || dto.x.isEmpty){
+            CoveredTargets.cover("ONE_PRESENT")
+            return ResponseEntity.status(404).build()
+        }
+
+        //should never be reached
+        return ResponseEntity.ok("patched")
+    }
+}
+
+data class BBJsonMergePatchDto(
+    @field:Schema(nullable = true)
+    val name: Optional<String>? = null,
+
+    @field:Schema(nullable = true)
+    val x: Optional<Int>? = null
+)
\ No newline at end of file
diff --git a/core-tests/e2e-tests/spring/spring-rest-bb/src/test/kotlin/com/foo/rest/examples/bb/jsonmergepatch/BBJsonMergePatchController.kt b/core-tests/e2e-tests/spring/spring-rest-bb/src/test/kotlin/com/foo/rest/examples/bb/jsonmergepatch/BBJsonMergePatchController.kt
new file mode 100644
index 0000000000..09d607bff2
--- /dev/null
+++ b/core-tests/e2e-tests/spring/spring-rest-bb/src/test/kotlin/com/foo/rest/examples/bb/jsonmergepatch/BBJsonMergePatchController.kt
@@ -0,0 +1,6 @@
+package com.foo.rest.examples.bb.jsonmergepatch
+
+import com.foo.rest.examples.bb.SpringController
+import com.foo.rest.examples.bb.jsonpatch.BBJsonPatchApplication
+
+class BBJsonMergePatchController : SpringController(BBJsonMergePatchApplication::class.java)
diff --git a/core-tests/e2e-tests/spring/spring-rest-bb/src/test/kotlin/org/evomaster/e2etests/spring/rest/bb/jsonmergepatch/BBJsonMergePatchEMTest.kt b/core-tests/e2e-tests/spring/spring-rest-bb/src/test/kotlin/org/evomaster/e2etests/spring/rest/bb/jsonmergepatch/BBJsonMergePatchEMTest.kt
new file mode 100644
index 0000000000..0b9460c827
--- /dev/null
+++ b/core-tests/e2e-tests/spring/spring-rest-bb/src/test/kotlin/org/evomaster/e2etests/spring/rest/bb/jsonmergepatch/BBJsonMergePatchEMTest.kt
@@ -0,0 +1,51 @@
+package org.evomaster.e2etests.spring.rest.bb.jsonmergepatch
+
+import com.foo.rest.examples.bb.jsonmergepatch.BBJsonMergePatchController
+import org.evomaster.core.output.OutputFormat
+import org.evomaster.core.problem.rest.data.HttpVerb
+import org.evomaster.e2etests.spring.rest.bb.SpringTestBase
+import org.junit.jupiter.api.Assertions.assertTrue
+import org.junit.jupiter.api.BeforeAll
+import org.junit.jupiter.params.ParameterizedTest
+import org.junit.jupiter.params.provider.EnumSource
+
+class BBJsonMergePatchEMTest : SpringTestBase() {
+
+    companion object {
+        init {
+            shouldApplyInstrumentation = false
+        }
+
+        @BeforeAll
+        @JvmStatic
+        fun init() {
+            initClass(BBJsonMergePatchController())
+        }
+    }
+
+
+
+    @ParameterizedTest
+    @EnumSource
+    fun testBlackBoxOutput(outputFormat: OutputFormat) {
+
+        executeAndEvaluateBBTest(
+            outputFormat,
+            "jsonmergepatch",
+            100,
+            3,
+            listOf("BOTH_UNDEFINED", "ONE_UNDEFINED", "BOTH_NULL","BOTH_PRESENT","ONE_PRESENT")
+        ){ args: MutableList<String> ->
+
+
+            val solution = initAndRun(args)
+
+            assertTrue(solution.individuals.size >= 1)
+            assertHasAtLeastOne(solution, HttpVerb.PATCH, 400, "/api/jsonmergepatch/", null)
+            assertHasAtLeastOne(solution, HttpVerb.PATCH, 401, "/api/jsonmergepatch/", null)
+            assertHasAtLeastOne(solution, HttpVerb.PATCH, 403, "/api/jsonmergepatch/", null)
+            assertHasAtLeastOne(solution, HttpVerb.PATCH, 404, "/api/jsonmergepatch/", null)
+            assertHasAtLeastOne(solution, HttpVerb.PATCH, 200, "/api/jsonmergepatch/", null)
+        }
+    }
+}