diff --git a/utbot-summary/build.gradle b/utbot-summary/build.gradle
index 66eaae3682..0ec442f9f0 100644
--- a/utbot-summary/build.gradle
+++ b/utbot-summary/build.gradle
@@ -9,5 +9,7 @@ dependencies {
 
     implementation group: 'com.github.javaparser', name: 'javaparser-core', version: '3.22.1'
 
+    testImplementation group: 'org.mockito', name: 'mockito-core', version: mockito_version
+
     testImplementation("org.junit.jupiter:junit-jupiter:$junit5_version")
 }
diff --git a/utbot-summary/src/main/kotlin/org/utbot/summary/comment/SimpleCommentBuilder.kt b/utbot-summary/src/main/kotlin/org/utbot/summary/comment/SimpleCommentBuilder.kt
index 579328fc32..eab1d0d3e6 100644
--- a/utbot-summary/src/main/kotlin/org/utbot/summary/comment/SimpleCommentBuilder.kt
+++ b/utbot-summary/src/main/kotlin/org/utbot/summary/comment/SimpleCommentBuilder.kt
@@ -349,7 +349,7 @@ open class SimpleCommentBuilder(
      * In case when an enclosing class in nested, we need to replace '$' with '.'
      * to render the reference.
      */
-    protected fun invokeDescription(className: String, methodName: String, methodParameterTypes: List<Type>): String {
+    fun invokeDescription(className: String, methodName: String, methodParameterTypes: List<Type>): String {
         val prettyClassName: String = className.replace("$", ".")
 
         return if (methodParameterTypes.isEmpty()) {
diff --git a/utbot-summary/src/test/kotlin/org/utbot/summary/comment/SimpleClusterCommentBuilderTest.kt b/utbot-summary/src/test/kotlin/org/utbot/summary/comment/SimpleClusterCommentBuilderTest.kt
new file mode 100644
index 0000000000..fe3c808717
--- /dev/null
+++ b/utbot-summary/src/test/kotlin/org/utbot/summary/comment/SimpleClusterCommentBuilderTest.kt
@@ -0,0 +1,62 @@
+package org.utbot.summary.comment
+
+import org.junit.jupiter.api.Assertions.assertEquals
+import org.junit.jupiter.api.BeforeAll
+import org.junit.jupiter.api.Test
+import org.junit.jupiter.api.TestInstance
+import org.mockito.Mockito.mock
+import org.mockito.Mockito.`when`
+import org.utbot.framework.plugin.api.Step
+import org.utbot.framework.plugin.api.UtOverflowFailure
+import org.utbot.summary.ast.JimpleToASTMap
+import org.utbot.summary.tag.StatementTag
+import org.utbot.summary.tag.TraceTag
+import soot.SootMethod
+import soot.jimple.Stmt
+import soot.jimple.internal.JReturnStmt
+
+@TestInstance(TestInstance.Lifecycle.PER_CLASS)
+class SimpleClusterCommentBuilderTest {
+    private lateinit var traceTag: TraceTag
+    private lateinit var jimpleToASTMap: JimpleToASTMap
+    private lateinit var sootToAst: MutableMap<SootMethod, JimpleToASTMap>
+    private lateinit var sootMethod: SootMethod
+    private lateinit var statementTag: StatementTag
+    private lateinit var step: Step
+    private lateinit var statement: Stmt
+
+    @BeforeAll
+    fun setUp() {
+        traceTag = mock(TraceTag::class.java)
+        sootMethod = mock(SootMethod::class.java)
+        jimpleToASTMap = mock(JimpleToASTMap::class.java)
+        statementTag = mock(StatementTag::class.java)
+        step = mock(Step::class.java)
+        statement = mock(JReturnStmt::class.java)
+        sootToAst = mutableMapOf()
+
+        `when`(statementTag.step).thenReturn(step)
+        `when`(step.stmt).thenReturn(statement)
+        `when`(traceTag.path).thenReturn(listOf(step))
+        `when`(traceTag.rootStatementTag).thenReturn(statementTag)
+        `when`(traceTag.result).thenReturn(UtOverflowFailure(Throwable()))
+
+        sootToAst[sootMethod] = jimpleToASTMap
+    }
+
+    @Test
+    fun `builds empty comment if execution result is null`() {
+        val commentBuilder = SimpleClusterCommentBuilder(traceTag, sootToAst)
+        val comment = commentBuilder.buildString(sootMethod)
+        assertEquals(" ", comment)
+    }
+
+    @Test
+    fun `builds empty doc statement if execution result is null`() {
+        val commentBuilder = SimpleClusterCommentBuilder(traceTag, sootToAst)
+        val statements = commentBuilder.buildDocStmts(sootMethod)
+        assertEquals(statements.size, 1)
+        assertEquals(statements[0].toString(), " ")
+    }
+
+}
\ No newline at end of file
diff --git a/utbot-summary/src/test/kotlin/org/utbot/summary/comment/SimpleCommentBuilderTest.kt b/utbot-summary/src/test/kotlin/org/utbot/summary/comment/SimpleCommentBuilderTest.kt
new file mode 100644
index 0000000000..39b995ccad
--- /dev/null
+++ b/utbot-summary/src/test/kotlin/org/utbot/summary/comment/SimpleCommentBuilderTest.kt
@@ -0,0 +1,84 @@
+package org.utbot.summary.comment
+
+import org.junit.jupiter.api.Assertions.assertEquals
+import org.junit.jupiter.api.BeforeAll
+import org.junit.jupiter.api.Test
+import org.junit.jupiter.api.TestInstance
+import org.mockito.Mockito.mock
+import org.mockito.Mockito.`when`
+import org.utbot.framework.plugin.api.Step
+import org.utbot.framework.plugin.api.UtOverflowFailure
+import org.utbot.summary.ast.JimpleToASTMap
+import org.utbot.summary.tag.StatementTag
+import org.utbot.summary.tag.TraceTag
+import soot.SootMethod
+import soot.jimple.Stmt
+import soot.jimple.internal.JReturnStmt
+
+@TestInstance(TestInstance.Lifecycle.PER_CLASS)
+class SimpleCommentBuilderTest {
+    private lateinit var traceTag: TraceTag
+    private lateinit var jimpleToASTMap: JimpleToASTMap
+    private lateinit var sootToAst: MutableMap<SootMethod, JimpleToASTMap>
+    private lateinit var sootMethod: SootMethod
+    private lateinit var statementTag: StatementTag
+    private lateinit var step: Step
+    private lateinit var statement: Stmt
+
+    @BeforeAll
+    fun setUp() {
+        traceTag = mock(TraceTag::class.java)
+        sootMethod = mock(SootMethod::class.java)
+        jimpleToASTMap = mock(JimpleToASTMap::class.java)
+        statementTag = mock(StatementTag::class.java)
+        step = mock(Step::class.java)
+        statement = mock(JReturnStmt::class.java)
+        sootToAst = mutableMapOf()
+
+        `when`(statementTag.step).thenReturn(step)
+        `when`(step.stmt).thenReturn(statement)
+        `when`(traceTag.path).thenReturn(listOf(step))
+        `when`(traceTag.rootStatementTag).thenReturn(statementTag)
+        `when`(traceTag.result).thenReturn(UtOverflowFailure(Throwable()))
+
+        sootToAst[sootMethod] = jimpleToASTMap
+    }
+
+    @Test
+    fun `throws throwable if execution result is null`() {
+        val commentBuilder = SimpleCommentBuilder(traceTag, sootToAst)
+        val comment = commentBuilder.buildString(sootMethod)
+        val expectedComment = "<pre>\n" +
+                "Test throws Throwable \n" +
+                "</pre>"
+        assertEquals(expectedComment, comment)
+    }
+
+    @Test
+    fun `builds one doc statement`() {
+        val commentBuilder = SimpleCommentBuilder(traceTag, sootToAst)
+        val statements = commentBuilder.buildDocStmts(sootMethod)
+        val expectedDocStatement = "Test \n" +
+                "throws Throwable \n"
+        assertEquals(statements.size, 1)
+        assertEquals(statements[0].toString(), expectedDocStatement)
+    }
+
+    @Test
+    fun `builds inline link for method`() {
+        val commentBuilder = SimpleCommentBuilder(traceTag, sootToAst)
+        val methodReference = commentBuilder.invokeDescription("org.utbot.ClassName", "methodName", listOf())
+        val expectedMethodReference = "{@link org.utbot.ClassName#methodName()}"
+        assertEquals(methodReference, expectedMethodReference)
+    }
+
+    @Test
+    fun `builds inline link for method in nested class`() {
+        val commentBuilder = SimpleCommentBuilder(traceTag, sootToAst)
+        val methodReference =
+            commentBuilder.invokeDescription("org.utbot.ClassName\$NestedClassName", "methodName", listOf())
+        val expectedMethodReference = "{@link org.utbot.ClassName.NestedClassName#methodName()}"
+        assertEquals(methodReference, expectedMethodReference)
+    }
+
+}
\ No newline at end of file
diff --git a/utbot-summary/src/test/kotlin/org/utbot/summary/name/SimpleNameBuilderTest.kt b/utbot-summary/src/test/kotlin/org/utbot/summary/name/SimpleNameBuilderTest.kt
new file mode 100644
index 0000000000..fc0acf2a91
--- /dev/null
+++ b/utbot-summary/src/test/kotlin/org/utbot/summary/name/SimpleNameBuilderTest.kt
@@ -0,0 +1,74 @@
+package org.utbot.summary.name
+
+import org.junit.jupiter.api.Assertions.assertEquals
+import org.junit.jupiter.api.BeforeAll
+import org.junit.jupiter.api.Test
+import org.junit.jupiter.api.TestInstance
+import org.mockito.Mockito.mock
+import org.mockito.Mockito.`when`
+import org.utbot.framework.plugin.api.UtOverflowFailure
+import org.utbot.summary.ast.JimpleToASTMap
+import org.utbot.summary.tag.TraceTag
+import org.utbot.summary.tag.UniquenessTag
+import soot.SootMethod
+
+@TestInstance(TestInstance.Lifecycle.PER_CLASS)
+class SimpleNameBuilderTest {
+    private lateinit var traceTag: TraceTag
+    private lateinit var jimpleToASTMap: JimpleToASTMap
+    private lateinit var sootToAst: MutableMap<SootMethod, JimpleToASTMap>
+    private lateinit var sootMethod: SootMethod
+
+    @BeforeAll
+    fun setUp() {
+        traceTag = mock(TraceTag::class.java)
+        sootMethod = mock(SootMethod::class.java)
+        jimpleToASTMap = mock(JimpleToASTMap::class.java)
+        sootToAst = mutableMapOf()
+
+        `when`(traceTag.result).thenReturn(UtOverflowFailure(Throwable()))
+
+        sootToAst[sootMethod] = jimpleToASTMap
+    }
+
+    @Test
+    fun `method name should start with test`() {
+        `when`(sootMethod.name).thenReturn("methodName")
+
+        val simpleNameBuilder = SimpleNameBuilder(traceTag, sootToAst, sootMethod)
+        val methodName = simpleNameBuilder.name
+        assert(methodName.startsWith("test"))
+    }
+
+    @Test
+    fun `creates a name pair with a candidate with a bigger index`() {
+        `when`(sootMethod.name).thenReturn("")
+
+        val simpleNameBuilder = SimpleNameBuilder(traceTag, sootToAst, sootMethod)
+        val fromCandidateName = DisplayNameCandidate("fromCandidate", UniquenessTag.Unique, 3)
+
+        val toCandidate1 = DisplayNameCandidate("candidate1", UniquenessTag.Common, 2)
+        val toCandidate2 = DisplayNameCandidate("candidate2", UniquenessTag.Common, 4)
+
+        val candidate = simpleNameBuilder.buildCandidate(fromCandidateName, toCandidate1, toCandidate2)
+
+        val resultPair = Pair(fromCandidateName.name, toCandidate2.name)
+        assertEquals(candidate, resultPair)
+    }
+
+    @Test
+    fun `returns null if candidates are equal`() {
+        `when`(sootMethod.name).thenReturn("")
+
+        val simpleNameBuilder = SimpleNameBuilder(traceTag, sootToAst, sootMethod)
+        val fromCandidateName = DisplayNameCandidate("candidate", UniquenessTag.Unique, 0)
+
+        // two equal candidates
+        val toCandidate1 = DisplayNameCandidate("candidate", UniquenessTag.Common, 1)
+        val toCandidate2 = DisplayNameCandidate("candidate", UniquenessTag.Common, 1)
+
+        val candidate = simpleNameBuilder.buildCandidate(fromCandidateName, toCandidate1, toCandidate2)
+
+        assertEquals(candidate, null)
+    }
+}
\ No newline at end of file
diff --git a/utbot-summary/src/test/resources/mockito-extensions/org.mockito.plugins.MockMaker b/utbot-summary/src/test/resources/mockito-extensions/org.mockito.plugins.MockMaker
new file mode 100644
index 0000000000..1f0955d450
--- /dev/null
+++ b/utbot-summary/src/test/resources/mockito-extensions/org.mockito.plugins.MockMaker
@@ -0,0 +1 @@
+mock-maker-inline