diff --git a/utbot-summary/src/main/kotlin/org/utbot/summary/comment/classic/fuzzer/SimpleCommentForTestProducedByFuzzerBuilder.kt b/utbot-summary/src/main/kotlin/org/utbot/summary/comment/classic/fuzzer/SimpleCommentForTestProducedByFuzzerBuilder.kt
index feec3bf19f..11f6780246 100644
--- a/utbot-summary/src/main/kotlin/org/utbot/summary/comment/classic/fuzzer/SimpleCommentForTestProducedByFuzzerBuilder.kt
+++ b/utbot-summary/src/main/kotlin/org/utbot/summary/comment/classic/fuzzer/SimpleCommentForTestProducedByFuzzerBuilder.kt
@@ -8,6 +8,7 @@ import org.utbot.fuzzer.FuzzedMethodDescription
 import org.utbot.fuzzer.FuzzedValue
 import org.utbot.summary.SummarySentenceConstants.NEW_LINE
 import org.utbot.summary.comment.customtags.getClassReference
+import org.utbot.summary.comment.customtags.getFullClassName
 import org.utbot.summary.comment.customtags.getMethodReferenceForFuzzingTest
 
 class SimpleCommentForTestProducedByFuzzerBuilder(
@@ -21,7 +22,7 @@ class SimpleCommentForTestProducedByFuzzerBuilder(
         val methodName = methodDescription.compilableName
 
         val result = if (packageName != null && className != null && methodName != null) {
-            val fullClassName = "$packageName.$className"
+            val fullClassName = getFullClassName(packageName, className)
 
             val methodReference = getMethodReferenceForFuzzingTest(
                 fullClassName,
diff --git a/utbot-summary/src/main/kotlin/org/utbot/summary/comment/customtags/CustomTagsUtil.kt b/utbot-summary/src/main/kotlin/org/utbot/summary/comment/customtags/CustomTagsUtil.kt
index cd64311a36..fda4050170 100644
--- a/utbot-summary/src/main/kotlin/org/utbot/summary/comment/customtags/CustomTagsUtil.kt
+++ b/utbot-summary/src/main/kotlin/org/utbot/summary/comment/customtags/CustomTagsUtil.kt
@@ -72,4 +72,9 @@ private fun formMethodReferenceForJavaDoc(
  */
 fun getClassReference(fullClassName: String): String {
     return "{@link ${fullClassName.replace(JAVA_CLASS_DELIMITER, JAVA_DOC_CLASS_DELIMITER)}}".replace(CARRIAGE_RETURN, EMPTY_STRING)
+}
+
+/** Returns correct full class name. */
+fun getFullClassName(packageName: String, className: String): String {
+    return if (packageName.isEmpty()) className else "$packageName.$className"
 }
\ No newline at end of file
diff --git a/utbot-summary/src/main/kotlin/org/utbot/summary/comment/customtags/fuzzer/CommentWithCustomTagForTestProducedByFuzzerBuilder.kt b/utbot-summary/src/main/kotlin/org/utbot/summary/comment/customtags/fuzzer/CommentWithCustomTagForTestProducedByFuzzerBuilder.kt
index a61247e247..0a417eca29 100644
--- a/utbot-summary/src/main/kotlin/org/utbot/summary/comment/customtags/fuzzer/CommentWithCustomTagForTestProducedByFuzzerBuilder.kt
+++ b/utbot-summary/src/main/kotlin/org/utbot/summary/comment/customtags/fuzzer/CommentWithCustomTagForTestProducedByFuzzerBuilder.kt
@@ -7,6 +7,7 @@ import org.utbot.fuzzer.FuzzedMethodDescription
 import org.utbot.fuzzer.FuzzedValue
 import org.utbot.summary.SummarySentenceConstants.CARRIAGE_RETURN
 import org.utbot.summary.comment.customtags.getClassReference
+import org.utbot.summary.comment.customtags.getFullClassName
 import org.utbot.summary.comment.customtags.getMethodReferenceForFuzzingTest
 import org.utbot.summary.comment.customtags.symbolic.CustomJavaDocTagProvider
 
@@ -35,7 +36,7 @@ class CommentWithCustomTagForTestProducedByFuzzerBuilder(
         val methodName = methodDescription.compilableName
 
         return if (packageName != null && className != null && methodName != null) {
-            val fullClassName = "$packageName.$className"
+            val fullClassName = getFullClassName(packageName, className)
 
             val methodReference = getMethodReferenceForFuzzingTest(
                 fullClassName,