diff --git a/src/main/java/com/endava/cats/fuzzer/special/CustomFuzzerUtil.java b/src/main/java/com/endava/cats/fuzzer/special/CustomFuzzerUtil.java
index f16f989b2..9d6b1edb4 100644
--- a/src/main/java/com/endava/cats/fuzzer/special/CustomFuzzerUtil.java
+++ b/src/main/java/com/endava/cats/fuzzer/special/CustomFuzzerUtil.java
@@ -38,7 +38,15 @@
 import java.util.stream.Collectors;
 
 import static com.endava.cats.json.JsonUtils.NOT_SET;
-import static com.endava.cats.util.CatsDSLWords.*;
+import static com.endava.cats.util.CatsDSLWords.CATS_HEADERS;
+import static com.endava.cats.util.CatsDSLWords.CHECKS;
+import static com.endava.cats.util.CatsDSLWords.DESCRIPTION;
+import static com.endava.cats.util.CatsDSLWords.EXPECTED_RESPONSE_CODE;
+import static com.endava.cats.util.CatsDSLWords.HTTP_METHOD;
+import static com.endava.cats.util.CatsDSLWords.ONE_OF_SELECTION;
+import static com.endava.cats.util.CatsDSLWords.OUTPUT;
+import static com.endava.cats.util.CatsDSLWords.RESERVED_WORDS;
+import static com.endava.cats.util.CatsDSLWords.VERIFY;
 
 @ApplicationScoped
 public class CustomFuzzerUtil {
@@ -209,10 +217,18 @@ private Map<String, String> matchVariablesWithTheResponse(CatsResponse response,
         //we make sure that "checkBoolean" is not marked as NOT_SET and set to TRUE so that is matched against the computed expression
         return result.entrySet()
                 .stream()
-                .map(entry -> entry.getKey().equalsIgnoreCase(CHECK) ? new AbstractMap.SimpleEntry<>(entry.getKey(), TRUE) : entry)
+                .map(CustomFuzzerUtil::remapCheckBoolean)
                 .collect(Collectors.toMap(Map.Entry::getKey, Map.Entry::getValue));
     }
 
+    private static Map.Entry<String, String> remapCheckBoolean(Map.Entry<String, String> entry) {
+        return CHECKS.entrySet()
+                .stream()
+                .filter(checkEntry -> entry.getKey().startsWith(checkEntry.getKey()))
+                .map(checkEntry -> new AbstractMap.SimpleEntry<>(entry.getKey(), checkEntry.getValue()))
+                .findFirst()
+                .orElseGet(() -> new AbstractMap.SimpleEntry<>(entry.getKey(), entry.getValue()));
+    }
 
     public String getTestScenario(String testName, Map<String, Object> currentPathValues) {
         String description = WordUtils.nullOrValueOf(currentPathValues.get(DESCRIPTION));
diff --git a/src/main/java/com/endava/cats/io/ServiceCaller.java b/src/main/java/com/endava/cats/io/ServiceCaller.java
index 3d845b67c..25155c82b 100755
--- a/src/main/java/com/endava/cats/io/ServiceCaller.java
+++ b/src/main/java/com/endava/cats/io/ServiceCaller.java
@@ -460,8 +460,8 @@ private String getContentType(HttpMethod method, String defaultContentType) {
     }
 
     private void addIfNotPresent(String headerName, String headerValue, ServiceData data, List<KeyValuePair<String, Object>> headers) {
-        boolean notAccept = data.getHeaders().stream().noneMatch(catsHeader -> catsHeader.getName().equalsIgnoreCase(headerName));
-        if (notAccept) {
+        boolean exists = data.getHeaders().stream().noneMatch(catsHeader -> catsHeader.getName().equalsIgnoreCase(headerName));
+        if (exists) {
             headers.add(new KeyValuePair<>(headerName, headerValue));
         }
     }
diff --git a/src/main/java/com/endava/cats/util/CatsDSLWords.java b/src/main/java/com/endava/cats/util/CatsDSLWords.java
index e3e22c530..19a9da770 100644
--- a/src/main/java/com/endava/cats/util/CatsDSLWords.java
+++ b/src/main/java/com/endava/cats/util/CatsDSLWords.java
@@ -1,6 +1,7 @@
 package com.endava.cats.util;
 
 import java.util.List;
+import java.util.Map;
 
 public abstract class CatsDSLWords {
     /**
@@ -17,10 +18,12 @@ public abstract class CatsDSLWords {
      */
     public static final String CHECK = "checkBoolean";
 
-    /**
-     * Self-explanatory.
-     */
-    public static final String TRUE = "true";
+    public static final String CHECK_TRUE = "checkTrue";
+
+    public static final String CHECK_FALSE = "checkFalse";
+
+    public static final Map<String, String> CHECKS = Map.of(CHECK, "true", CHECK_TRUE, "true", CHECK_FALSE, "false");
+
     /**
      * Reserved word used in CATS DSL files to specify the http method to be run.
      */
diff --git a/src/test/java/com/endava/cats/args/FilterArgumentsTest.java b/src/test/java/com/endava/cats/args/FilterArgumentsTest.java
index f05db972e..58698818f 100644
--- a/src/test/java/com/endava/cats/args/FilterArgumentsTest.java
+++ b/src/test/java/com/endava/cats/args/FilterArgumentsTest.java
@@ -92,7 +92,7 @@ void shouldIncludeAllFuzzers() {
         List<String> fuzzers = filterArguments.getFirstPhaseFuzzersForPath();
 
         Assertions.assertThat(fuzzers).contains("LeadingControlCharsInHeadersFuzzer", "LeadingWhitespacesInHeadersFuzzer", "LeadingMultiCodePointEmojisInFieldsTrimValidateFuzzer"
-                , "RemoveFieldsFuzzer", "CheckSecurityHeadersFuzzer").hasSize(118);
+                , "RemoveFieldsFuzzer", "CheckSecurityHeadersFuzzer").hasSize(124);
     }
 
     @Test
@@ -159,7 +159,7 @@ void shouldReturnGetAndDeleteWhenNotHttpMethodSupplied() {
 
     @Test
     void shouldReturnAllRegisteredFuzzers() {
-        Assertions.assertThat(filterArguments.getAllRegisteredFuzzers()).hasSize(122);
+        Assertions.assertThat(filterArguments.getAllRegisteredFuzzers()).hasSize(128);
     }
 
     @Test
diff --git a/src/test/java/com/endava/cats/fuzzer/http/EmptyJsonArrayBodyFuzzerTest.java b/src/test/java/com/endava/cats/fuzzer/http/EmptyJsonArrayBodyFuzzerTest.java
index d5a152fd6..fbe853b50 100644
--- a/src/test/java/com/endava/cats/fuzzer/http/EmptyJsonArrayBodyFuzzerTest.java
+++ b/src/test/java/com/endava/cats/fuzzer/http/EmptyJsonArrayBodyFuzzerTest.java
@@ -1,7 +1,76 @@
 package com.endava.cats.fuzzer.http;
 
+import com.endava.cats.fuzzer.executor.SimpleExecutor;
+import com.endava.cats.http.HttpMethod;
+import com.endava.cats.http.ResponseCodeFamily;
+import com.endava.cats.io.ServiceCaller;
+import com.endava.cats.model.CatsResponse;
+import com.endava.cats.model.FuzzingData;
+import com.endava.cats.report.TestCaseExporter;
+import com.endava.cats.report.TestCaseListener;
 import io.quarkus.test.junit.QuarkusTest;
+import io.quarkus.test.junit.mockito.InjectSpy;
+import io.swagger.v3.oas.models.media.StringSchema;
+import org.assertj.core.api.Assertions;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+import org.mockito.Mockito;
+import org.springframework.test.util.ReflectionTestUtils;
+
+import java.util.List;
 
 @QuarkusTest
-class EmptyJsonArrayBodyTest {
+class EmptyJsonArrayBodyFuzzerTest {
+    private ServiceCaller serviceCaller;
+    @InjectSpy
+    private TestCaseListener testCaseListener;
+    private EmptyJsonArrayBodyFuzzer emptyJsonArrayBodyFuzzer;
+
+    @BeforeEach
+    void setup() {
+        serviceCaller = Mockito.mock(ServiceCaller.class);
+        SimpleExecutor simpleExecutor = new SimpleExecutor(testCaseListener, serviceCaller);
+        emptyJsonArrayBodyFuzzer = new EmptyJsonArrayBodyFuzzer(simpleExecutor);
+        ReflectionTestUtils.setField(testCaseListener, "testCaseExporter", Mockito.mock(TestCaseExporter.class));
+    }
+
+    @Test
+    void shouldNotRunForEmptyPayload() {
+        emptyJsonArrayBodyFuzzer.fuzz(Mockito.mock(FuzzingData.class));
+
+        Mockito.verifyNoInteractions(testCaseListener);
+    }
+
+    @Test
+    void givenAHttpMethodWithPayload_whenApplyingTheMalformedJsonFuzzer_thenTheResultsAreCorrectlyReported() {
+        FuzzingData data = FuzzingData.builder().method(HttpMethod.POST).reqSchema(new StringSchema()).requestContentTypes(List.of("application/json")).build();
+        ReflectionTestUtils.setField(data, "processedPayload", "{\"id\": 1}");
+
+        CatsResponse catsResponse = CatsResponse.builder().body("{}").responseCode(400).build();
+        Mockito.when(serviceCaller.call(Mockito.any())).thenReturn(catsResponse);
+        Mockito.doNothing().when(testCaseListener).reportResult(Mockito.any(), Mockito.eq(data), Mockito.any(), Mockito.any(), Mockito.anyBoolean());
+
+        emptyJsonArrayBodyFuzzer.fuzz(data);
+        Mockito.verify(testCaseListener, Mockito.times(1)).reportResult(Mockito.any(), Mockito.eq(data), Mockito.eq(catsResponse), Mockito.eq(ResponseCodeFamily.FOURXX), Mockito.anyBoolean());
+    }
+
+    @Test
+    void shouldHaveToString() {
+        Assertions.assertThat(emptyJsonArrayBodyFuzzer).hasToString(emptyJsonArrayBodyFuzzer.getClass().getSimpleName());
+    }
+
+    @Test
+    void shouldHaveDescription() {
+        Assertions.assertThat(emptyJsonArrayBodyFuzzer.description()).isNotBlank();
+    }
+
+    @Test
+    void shouldSkipForNonHttpBodyMethods() {
+        Assertions.assertThat(emptyJsonArrayBodyFuzzer.skipForHttpMethods()).contains(HttpMethod.GET, HttpMethod.DELETE);
+    }
+
+    @Test
+    void shouldHaveNullPayload() {
+        Assertions.assertThat(emptyJsonArrayBodyFuzzer.getPayload(null)).isEqualTo("[]");
+    }
 }
diff --git a/src/test/resources/functionalFuzzer-verify.yml b/src/test/resources/functionalFuzzer-verify.yml
index 87a9f7bdb..a968a7e63 100644
--- a/src/test/resources/functionalFuzzer-verify.yml
+++ b/src/test/resources/functionalFuzzer-verify.yml
@@ -14,6 +14,9 @@
       id: 25
       $#length(): 3
       checkBoolean: T(java.time.LocalDate).now().isAfter(T(java.time.LocalDate).parse(expiry.toString()))
+      checkTrue: T(java.time.LocalDate).now().isAfter(T(java.time.LocalDate).parse(expiry.toString()))
+      checkFalse: T(java.time.LocalDate).now().isBefore(T(java.time.LocalDate).parse(expiry.toString()))
+      checkTrue_2: T(java.time.LocalDate).now().isAfter(T(java.time.LocalDate).parse(expiry.toString()))
   test_2:
     description: Second Test Case
     pet: ${resp}