diff --git a/liquidjava-verifier/pom.xml b/liquidjava-verifier/pom.xml
index e9727bff..f69b52f2 100644
--- a/liquidjava-verifier/pom.xml
+++ b/liquidjava-verifier/pom.xml
@@ -213,6 +213,45 @@
 					<!-- <autoPublish>true</autoPublish> -->
 				</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>0.60</minimum>
+										</limit>
+									</limits>
+								</rule>
+							</rules>
+						</configuration>
+					</execution>
+				</executions>
+			</plugin>
 		</plugins>
 	</build>
 
diff --git a/liquidjava-verifier/src/test/java/liquidjava/ast/opt/TestIte.java b/liquidjava-verifier/src/test/java/liquidjava/ast/opt/TestIte.java
new file mode 100644
index 00000000..3c01f8c1
--- /dev/null
+++ b/liquidjava-verifier/src/test/java/liquidjava/ast/opt/TestIte.java
@@ -0,0 +1,17 @@
+import static org.junit.Assert.assertEquals;
+import org.junit.Test;
+import liquidjava.rj_language.ast.LiteralInt;
+import liquidjava.rj_language.ast.Ite;
+
+public class TestIte {
+    @Test
+    public void testIte() {
+        LiteralInt i1 = new LiteralInt(3);
+        LiteralInt i2 = new LiteralInt(3);
+
+        Ite ite1 = new Ite(i1, i1, i1);
+        Ite ite2 = new Ite(i2, i2, i2);
+
+        assertEquals(ite1.hashCode(), ite2.hashCode());
+    }
+}
diff --git a/liquidjava-verifier/src/test/java/liquidjava/ast/opt/TestOptimization.java b/liquidjava-verifier/src/test/java/liquidjava/ast/opt/TestOptimization.java
new file mode 100644
index 00000000..046f0289
--- /dev/null
+++ b/liquidjava-verifier/src/test/java/liquidjava/ast/opt/TestOptimization.java
@@ -0,0 +1,16 @@
+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));
+    }
+}
\ No newline at end of file
diff --git a/liquidjava-verifier/src/test/java/liquidjava/diagnostics/TestLJDiagnostic.java b/liquidjava-verifier/src/test/java/liquidjava/diagnostics/TestLJDiagnostic.java
new file mode 100644
index 00000000..2ebaa96b
--- /dev/null
+++ b/liquidjava-verifier/src/test/java/liquidjava/diagnostics/TestLJDiagnostic.java
@@ -0,0 +1,16 @@
+package liquidjava.diagnostics;
+
+import static org.junit.Assert.assertTrue;
+import org.junit.Test;
+
+public class TestLJDiagnostic {
+    @Test
+    public void testGetTitle() {
+        String title1 = "title";
+        String title2 = "fake title";
+        LJDiagnostic ljd = new LJDiagnostic(title1, null, null, null, null);
+
+        assertTrue(ljd.getTitle().equals(title1));
+        assertTrue(!ljd.getTitle().equals(title2));
+    }
+}
diff --git a/liquidjava-verifier/src/test/java/liquidjava/rj_language/ast/TestFunctionInvocation.java b/liquidjava-verifier/src/test/java/liquidjava/rj_language/ast/TestFunctionInvocation.java
new file mode 100644
index 00000000..84dd278d
--- /dev/null
+++ b/liquidjava-verifier/src/test/java/liquidjava/rj_language/ast/TestFunctionInvocation.java
@@ -0,0 +1,21 @@
+package liquidjava.rj_language.ast;
+
+import static org.junit.Assert.assertTrue;
+import org.junit.Test;
+import java.util.Arrays;
+
+public class TestFunctionInvocation {
+    @Test
+    public void testFunctionInvocationEqualsAndHashcode() {
+        Expression exp1 = new LiteralString("./testFiles/file.txt");
+        Expression exp2 = new LiteralString("./testFiles/file_fake.txt");
+
+        FunctionInvocation f1 = new FunctionInvocation("java.nio.file.Paths.get", Arrays.asList(exp1));
+        FunctionInvocation f2 = new FunctionInvocation("java.nio.file.Paths.get", Arrays.asList(exp1));
+        FunctionInvocation f3 = new FunctionInvocation("java.nio.file.Paths.get", Arrays.asList(exp2));
+
+        assertTrue(f1.equals(f2) && !f1.equals(f3));
+        assertTrue(f1.hashCode() == f2.hashCode() && f1.hashCode() != f3.hashCode());
+    }
+
+}
diff --git a/liquidjava-verifier/src/test/java/liquidjava/rj_language/opt/TestLiteralString.java b/liquidjava-verifier/src/test/java/liquidjava/rj_language/opt/TestLiteralString.java
new file mode 100644
index 00000000..bb198e05
--- /dev/null
+++ b/liquidjava-verifier/src/test/java/liquidjava/rj_language/opt/TestLiteralString.java
@@ -0,0 +1,14 @@
+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());
+    }
+}
\ No newline at end of file