diff --git a/src/test/java/de/stklcode/jvault/connector/model/response/CredentialsResponseTest.java b/src/test/java/de/stklcode/jvault/connector/model/response/CredentialsResponseTest.java
new file mode 100644
index 0000000..052f27a
--- /dev/null
+++ b/src/test/java/de/stklcode/jvault/connector/model/response/CredentialsResponseTest.java
@@ -0,0 +1,66 @@
+/*
+ * Copyright 2016-2018 Stefan Kalscheuer
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package de.stklcode.jvault.connector.model.response;
+
+import com.fasterxml.jackson.databind.ObjectMapper;
+import de.stklcode.jvault.connector.exception.InvalidResponseException;
+import org.junit.jupiter.api.Test;
+
+import java.io.IOException;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+
+import static org.hamcrest.MatcherAssert.assertThat;
+import static org.hamcrest.Matchers.*;
+import static org.junit.jupiter.api.Assertions.fail;
+
+/**
+ * JUnit Test for {@link CredentialsResponse} model.
+ *
+ * @author Stefan Kalscheuer
+ * @since 0.8
+ */
+public class CredentialsResponseTest {
+    private static final Map<String, Object> DATA = new HashMap<>();
+    private static final String VAL_USER = "testUserName";
+    private static final String VAL_PASS = "5up3r5ecr3tP455";
+
+    static {
+        DATA.put("username", VAL_USER);
+        DATA.put("password", VAL_PASS);
+    }
+
+    /**
+     * Test getter, setter and get-methods for response data.
+     *
+     * @throws InvalidResponseException Should not occur
+     */
+    @Test
+    @SuppressWarnings("unchecked")
+    public void getCredentialsTest() throws InvalidResponseException {
+        // Create empty Object.
+        CredentialsResponse res = new CredentialsResponse();
+        assertThat("Username not present in data map should not return anything", res.getUsername(), is(nullValue()));
+        assertThat("Password not present in data map should not return anything", res.getPassword(), is(nullValue()));
+
+        // Fill data map.
+        res.setData(DATA);
+        assertThat("Incorrect username", res.getUsername(), is(VAL_USER));
+        assertThat("Incorrect password", res.getPassword(), is(VAL_PASS));
+    }
+}
diff --git a/src/test/java/de/stklcode/jvault/connector/model/response/SecretListResponseTest.java b/src/test/java/de/stklcode/jvault/connector/model/response/SecretListResponseTest.java
new file mode 100644
index 0000000..1af02e0
--- /dev/null
+++ b/src/test/java/de/stklcode/jvault/connector/model/response/SecretListResponseTest.java
@@ -0,0 +1,75 @@
+/*
+ * Copyright 2016-2018 Stefan Kalscheuer
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package de.stklcode.jvault.connector.model.response;
+
+import de.stklcode.jvault.connector.exception.InvalidResponseException;
+import org.junit.jupiter.api.Test;
+
+import java.util.Arrays;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+
+import static org.hamcrest.MatcherAssert.assertThat;
+import static org.hamcrest.Matchers.*;
+import static org.junit.Assert.fail;
+
+/**
+ * JUnit Test for {@link SecretListResponse} model.
+ *
+ * @author Stefan Kalscheuer
+ * @since 0.8
+ */
+public class SecretListResponseTest {
+    private static final Map<String, Object> DATA = new HashMap<>();
+    private static final String KEY1 = "key1";
+    private static final String KEY2 = "key-2";
+    private static final List<String> KEYS = Arrays.asList(KEY1, KEY2);
+
+    static {
+        DATA.put("keys", KEYS);
+    }
+
+    /**
+     * Test getter, setter and get-methods for response data.
+     *
+     * @throws InvalidResponseException Should not occur
+     */
+    @Test
+    @SuppressWarnings("unchecked")
+    public void getKeysTest() throws InvalidResponseException {
+        // Create empty Object.
+        SecretListResponse res = new SecretListResponse();
+        assertThat("Keys should be null without initialization", res.getKeys(), is(nullValue()));
+
+        // Provoke internal ClassCastException.
+        try {
+            Map<String, Object> invalidData = new HashMap<>();
+            invalidData.put("keys", "some string");
+            res.setData(invalidData);
+            fail("Setting incorrect class succeeded");
+        } catch (Exception e) {
+            assertThat("Unexpected exception type", e, instanceOf(InvalidResponseException.class));
+        }
+
+        // Fill correct data.
+        res.setData(DATA);
+        assertThat("Keys should be filled here", res.getKeys(), is(notNullValue()));
+        assertThat("Unexpected number of keys", res.getKeys(), hasSize(2));
+        assertThat("Unexpected keys", res.getKeys(), contains(KEY1, KEY2));
+    }
+}