diff --git a/acme4j-client/src/test/java/org/shredzone/acme4j/AccountTest.java b/acme4j-client/src/test/java/org/shredzone/acme4j/AccountTest.java
index 83857190..566df158 100644
--- a/acme4j-client/src/test/java/org/shredzone/acme4j/AccountTest.java
+++ b/acme4j-client/src/test/java/org/shredzone/acme4j/AccountTest.java
@@ -21,7 +21,6 @@ import static uk.co.datumedge.hamcrest.json.SameJSONAs.sameJSONAs;
 import java.io.IOException;
 import java.net.HttpURLConnection;
 import java.net.URI;
-import java.net.URISyntaxException;
 import java.net.URL;
 import java.security.KeyPair;
 import java.util.Arrays;
diff --git a/acme4j-client/src/test/java/org/shredzone/acme4j/provider/TestableConnectionProvider.java b/acme4j-client/src/test/java/org/shredzone/acme4j/provider/TestableConnectionProvider.java
index 4affc3d2..e8239091 100644
--- a/acme4j-client/src/test/java/org/shredzone/acme4j/provider/TestableConnectionProvider.java
+++ b/acme4j-client/src/test/java/org/shredzone/acme4j/provider/TestableConnectionProvider.java
@@ -26,7 +26,6 @@ import org.shredzone.acme4j.challenge.Challenge;
 import org.shredzone.acme4j.connector.Connection;
 import org.shredzone.acme4j.connector.DummyConnection;
 import org.shredzone.acme4j.connector.Resource;
-import org.shredzone.acme4j.exception.AcmeException;
 import org.shredzone.acme4j.toolbox.JSON;
 import org.shredzone.acme4j.toolbox.JSONBuilder;
 import org.shredzone.acme4j.toolbox.TestUtils;
diff --git a/acme4j-client/src/test/java/org/shredzone/acme4j/toolbox/JSONBuilderTest.java b/acme4j-client/src/test/java/org/shredzone/acme4j/toolbox/JSONBuilderTest.java
index 28500755..7da2bd47 100644
--- a/acme4j-client/src/test/java/org/shredzone/acme4j/toolbox/JSONBuilderTest.java
+++ b/acme4j-client/src/test/java/org/shredzone/acme4j/toolbox/JSONBuilderTest.java
@@ -18,7 +18,6 @@ import static org.junit.Assert.assertThat;
 
 import java.io.IOException;
 import java.security.KeyPair;
-import java.security.NoSuchAlgorithmException;
 import java.time.Instant;
 import java.time.ZoneId;
 import java.time.ZonedDateTime;