diff --git a/spring-cloud-openfeign-core/src/test/java/org/springframework/cloud/openfeign/encoding/Invoices.java b/spring-cloud-openfeign-core/src/test/java/org/springframework/cloud/openfeign/encoding/Invoices.java
index 7c5ab020..175fb77a 100644
--- a/spring-cloud-openfeign-core/src/test/java/org/springframework/cloud/openfeign/encoding/Invoices.java
+++ b/spring-cloud-openfeign-core/src/test/java/org/springframework/cloud/openfeign/encoding/Invoices.java
@@ -30,6 +30,10 @@ import org.springframework.cloud.openfeign.encoding.app.domain.Invoice;
  */
 final class Invoices {
 
+	private Invoices() {
+		throw new IllegalStateException("Should not instantiate utility class");
+	}
+
 	public static List<Invoice> createInvoiceList(int count) {
 		final List<Invoice> invoices = new ArrayList<>();
 		for (int ind = 0; ind < count; ind++) {
diff --git a/spring-cloud-openfeign-core/src/test/java/org/springframework/cloud/openfeign/test/EqualsAndHashCodeAssert.java b/spring-cloud-openfeign-core/src/test/java/org/springframework/cloud/openfeign/test/EqualsAndHashCodeAssert.java
index d935a1a1..6e380e05 100644
--- a/spring-cloud-openfeign-core/src/test/java/org/springframework/cloud/openfeign/test/EqualsAndHashCodeAssert.java
+++ b/spring-cloud-openfeign-core/src/test/java/org/springframework/cloud/openfeign/test/EqualsAndHashCodeAssert.java
@@ -25,7 +25,11 @@ import static org.assertj.core.api.Assertions.assertThat;
  *
  * @author Jonatan Ivanov
  */
-public class EqualsAndHashCodeAssert {
+public final class EqualsAndHashCodeAssert {
+
+	private EqualsAndHashCodeAssert() {
+		throw new IllegalStateException("Should not instantiate utility class");
+	}
 
 	/**
 	 * Checks if equals is reflexive: for any non-null reference value x, x.equals(x)
diff --git a/src/checkstyle/checkstyle-suppressions.xml b/src/checkstyle/checkstyle-suppressions.xml
index 81b1ab02..e3cf17bb 100644
--- a/src/checkstyle/checkstyle-suppressions.xml
+++ b/src/checkstyle/checkstyle-suppressions.xml
@@ -13,6 +13,7 @@
 	<suppress files=".*ProtobufTest.*" checks="LineLengthCheck" />
 	<suppress files=".*Hello.*" checks="RedundantModifier"/>
 	<suppress files=".*test.*" checks="JavadocStyle"/>
+	<suppress files=".*test.*" checks="JavadocVariable"/>
 	<!-- Important -->
 	<suppress files=".*HttpEncoding.*" checks="InterfaceIsTypeCheck" />
 </suppressions>