diff --git a/liquidjava-verifier/pom.xml b/liquidjava-verifier/pom.xml
index 5b42f4cb..0de3675b 100644
--- a/liquidjava-verifier/pom.xml
+++ b/liquidjava-verifier/pom.xml
@@ -39,6 +39,45 @@
 				</configuration>
 			</plugin>
 			<plugin>
+<groupId>org.jacoco</groupId>
+<artifactId>jacoco-maven-plugin</artifactId>
+<version>0.8.14</version>
+<executions>
+<execution>
+<id>default-prepare-agent</id>
+<goals>
+<goal>prepare-agent</goal>
+</goals>
+</execution>
+<execution>
+<id>default-report</id>
+<goals>
+<goal>report</goal>
+</goals>
+</execution>
+<execution>
+<id>default-check</id>
+<goals>
+<goal>check</goal>
+</goals>
+<configuration>
+<rules>
+<rule>
+<element>BUNDLE</element>
+<limits>
+<limit>
+<counter>COMPLEXITY</counter>
+<value>COVEREDRATIO</value>
+<minimum>0.40</minimum>
+</limit>
+</limits>
+</rule>
+</rules>
+</configuration>
+</execution>
+</executions>
+</plugin>
+			<plugin>
 				<groupId>org.apache.maven.plugins</groupId>
 				<artifactId>maven-compiler-plugin</artifactId>
 				<version>${pVersion.compiler}</version>
@@ -193,7 +232,7 @@
 			<artifactId>gson</artifactId>
 			<version>2.10.1</version>
 		</dependency>
-
+		
 	</dependencies>
 	<dependencyManagement>
 		<dependencies>
diff --git a/liquidjava-verifier/src/test/java/liquidjava/rj_language/TestLiteralString.java b/liquidjava-verifier/src/test/java/liquidjava/rj_language/TestLiteralString.java
new file mode 100644
index 00000000..341ce079
--- /dev/null
+++ b/liquidjava-verifier/src/test/java/liquidjava/rj_language/TestLiteralString.java
@@ -0,0 +1,15 @@
+
+package liquidjava.rj_language;
+
+import static org.junit.Assert.assertNotEquals;
+import org.junit.Test;
+import liquidjava.rj_language.ast.LiteralString;
+
+public class TestLiteralString {
+    @Test
+    public void testLiteralString() {
+        LiteralString s1 = new LiteralString("hello");
+        LiteralString s2 = new LiteralString("world");
+        assertNotEquals(s1.hashCode(), s2.hashCode());
+    }
+}
diff --git a/liquidjava-verifier/src/test/java/liquidjava/rj_language/opt/TestLiteralBoolean.java b/liquidjava-verifier/src/test/java/liquidjava/rj_language/opt/TestLiteralBoolean.java
new file mode 100644
index 00000000..82b4c70f
--- /dev/null
+++ b/liquidjava-verifier/src/test/java/liquidjava/rj_language/opt/TestLiteralBoolean.java
@@ -0,0 +1,16 @@
+package liquidjava.rj_language.ast;
+
+import org.junit.jupiter.api.Test;
+import static org.junit.jupiter.api.Assertions.assertTrue;
+
+/**
+ * Testa o método LiteralBoolean devolve a string "true" quando o valor booleano interno é verdadeiro
+ */
+
+class LiteralBooleanSimplestTest {
+
+    @Test
+    void testIsBooleanTrue() {
+        assertTrue(new LiteralBoolean(true).isBooleanTrue());
+    }
+}
diff --git a/liquidjava-verifier/src/test/java/liquidjava/rj_language/opt/TestLiteralInt.java b/liquidjava-verifier/src/test/java/liquidjava/rj_language/opt/TestLiteralInt.java
new file mode 100644
index 00000000..0d485d2c
--- /dev/null
+++ b/liquidjava-verifier/src/test/java/liquidjava/rj_language/opt/TestLiteralInt.java
@@ -0,0 +1,16 @@
+package liquidjava.rj_language.ast;
+
+import org.junit.jupiter.api.Test;
+import static org.junit.jupiter.api.Assertions.assertEquals;
+
+/**
+ * Testa se o método LiteralInt devolve o número em formato de texto
+ */
+
+class TestLiteralInt {
+
+    @Test
+    void testToStringReturnsNumber() {
+        assertEquals("42", new LiteralInt(42).toString());
+    }
+}
diff --git a/liquidjava-verifier/src/test/java/liquidjava/rj_language/opt/TestOptimization.java b/liquidjava-verifier/src/test/java/liquidjava/rj_language/opt/TestOptimization.java
new file mode 100644
index 00000000..cdf819a8
--- /dev/null
+++ b/liquidjava-verifier/src/test/java/liquidjava/rj_language/opt/TestOptimization.java
@@ -0,0 +1,18 @@
+import static org.junit.Assert.assertEquals;
+
+import org.junit.Test;
+
+import liquidjava.rj_language.ast.BinaryExpression;
+import liquidjava.rj_language.ast.LiteralInt;
+import liquidjava.rj_language.opt.ConstantFolding;
+import liquidjava.rj_language.opt.derivation_node.ValDerivationNode;
+
+public class TestOptimization {
+    @Test
+    public void testBinaryFold() {
+        BinaryExpression b = new BinaryExpression(new LiteralInt(1), "+", new LiteralInt(2));
+
+        ValDerivationNode r = ConstantFolding.fold(new ValDerivationNode(b, null));
+        assertEquals(r.getValue(), new LiteralInt(3));
+    }
+}
diff --git a/liquidjava-verifier/src/test/java/liquidjava/rj_language/opt/TesteIntegracao.java b/liquidjava-verifier/src/test/java/liquidjava/rj_language/opt/TesteIntegracao.java
new file mode 100644
index 00000000..25650fdc
--- /dev/null
+++ b/liquidjava-verifier/src/test/java/liquidjava/rj_language/opt/TesteIntegracao.java
@@ -0,0 +1,17 @@
+package liquidjava.api.tests;
+
+import static org.junit.Assert.fail;
+
+import liquidjava.api.CommandLineLauncher;
+import org.junit.Test;
+
+public class TesteIntegracao {
+    /**
+     * Testa se a execução do método principal de CommandLineLauncher sem argumentos arranca sem lançar exceções
+     */
+    @Test
+    public void testMainWithNoArguments() {
+        CommandLineLauncher.main(new String[] {});
+    }
+
+}