diff --git a/src/test/java/io/kamax/mxisd/backend/exec/ExecAuthStoreTest.java b/src/test/java/io/kamax/mxisd/test/backend/exec/ExecAuthStoreTest.java
similarity index 97%
rename from src/test/java/io/kamax/mxisd/backend/exec/ExecAuthStoreTest.java
rename to src/test/java/io/kamax/mxisd/test/backend/exec/ExecAuthStoreTest.java
index de26ae0..a609162 100644
--- a/src/test/java/io/kamax/mxisd/backend/exec/ExecAuthStoreTest.java
+++ b/src/test/java/io/kamax/mxisd/test/backend/exec/ExecAuthStoreTest.java
@@ -18,11 +18,13 @@
  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
 
-package io.kamax.mxisd.backend.exec;
+package io.kamax.mxisd.test.backend.exec;
 
 import io.kamax.matrix.MatrixID;
 import io.kamax.matrix._MatrixID;
 import io.kamax.mxisd.UserIdType;
+import io.kamax.mxisd.backend.exec.ExecAuthResult;
+import io.kamax.mxisd.backend.exec.ExecAuthStore;
 import io.kamax.mxisd.config.ExecConfig;
 import org.apache.commons.lang3.RandomStringUtils;
 import org.junit.Before;
diff --git a/src/test/java/io/kamax/mxisd/backend/exec/ExecDirectoryStoreTest.java b/src/test/java/io/kamax/mxisd/test/backend/exec/ExecDirectoryStoreTest.java
similarity index 97%
rename from src/test/java/io/kamax/mxisd/backend/exec/ExecDirectoryStoreTest.java
rename to src/test/java/io/kamax/mxisd/test/backend/exec/ExecDirectoryStoreTest.java
index edaf8e9..f9e781a 100644
--- a/src/test/java/io/kamax/mxisd/backend/exec/ExecDirectoryStoreTest.java
+++ b/src/test/java/io/kamax/mxisd/test/backend/exec/ExecDirectoryStoreTest.java
@@ -18,10 +18,12 @@
  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
 
-package io.kamax.mxisd.backend.exec;
+package io.kamax.mxisd.test.backend.exec;
 
 import io.kamax.matrix.MatrixID;
 import io.kamax.matrix.json.GsonUtil;
+import io.kamax.mxisd.backend.exec.ExecDirectoryStore;
+import io.kamax.mxisd.backend.exec.ExecStore;
 import io.kamax.mxisd.config.ExecConfig;
 import io.kamax.mxisd.exception.InternalServerError;
 import io.kamax.mxisd.http.io.UserDirectorySearchResult;
diff --git a/src/test/java/io/kamax/mxisd/backend/exec/ExecIdentityStoreTest.java b/src/test/java/io/kamax/mxisd/test/backend/exec/ExecIdentityStoreTest.java
similarity index 97%
rename from src/test/java/io/kamax/mxisd/backend/exec/ExecIdentityStoreTest.java
rename to src/test/java/io/kamax/mxisd/test/backend/exec/ExecIdentityStoreTest.java
index 863c559..1ce96e1 100644
--- a/src/test/java/io/kamax/mxisd/backend/exec/ExecIdentityStoreTest.java
+++ b/src/test/java/io/kamax/mxisd/test/backend/exec/ExecIdentityStoreTest.java
@@ -18,7 +18,7 @@
  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
 
-package io.kamax.mxisd.backend.exec;
+package io.kamax.mxisd.test.backend.exec;
 
 import com.google.gson.JsonObject;
 import io.kamax.matrix.MatrixID;
@@ -26,6 +26,8 @@ import io.kamax.matrix.ThreePidMedium;
 import io.kamax.matrix.json.GsonUtil;
 import io.kamax.mxisd.UserID;
 import io.kamax.mxisd.UserIdType;
+import io.kamax.mxisd.backend.exec.ExecIdentityStore;
+import io.kamax.mxisd.backend.exec.ExecStore;
 import io.kamax.mxisd.backend.rest.LookupSingleResponseJson;
 import io.kamax.mxisd.config.ExecConfig;
 import io.kamax.mxisd.exception.InternalServerError;
diff --git a/src/test/java/io/kamax/mxisd/backend/exec/ExecProfileStoreTest.java b/src/test/java/io/kamax/mxisd/test/backend/exec/ExecProfileStoreTest.java
similarity index 97%
rename from src/test/java/io/kamax/mxisd/backend/exec/ExecProfileStoreTest.java
rename to src/test/java/io/kamax/mxisd/test/backend/exec/ExecProfileStoreTest.java
index 70aa776..2019b93 100644
--- a/src/test/java/io/kamax/mxisd/backend/exec/ExecProfileStoreTest.java
+++ b/src/test/java/io/kamax/mxisd/test/backend/exec/ExecProfileStoreTest.java
@@ -18,7 +18,7 @@
  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
 
-package io.kamax.mxisd.backend.exec;
+package io.kamax.mxisd.test.backend.exec;
 
 import com.google.gson.JsonObject;
 import io.kamax.matrix.MatrixID;
@@ -27,6 +27,8 @@ import io.kamax.matrix.ThreePidMedium;
 import io.kamax.matrix._ThreePid;
 import io.kamax.matrix.json.GsonUtil;
 import io.kamax.mxisd.UserIdType;
+import io.kamax.mxisd.backend.exec.ExecProfileStore;
+import io.kamax.mxisd.backend.exec.ExecStore;
 import io.kamax.mxisd.config.ExecConfig;
 import io.kamax.mxisd.profile.JsonProfileResult;
 import org.junit.Test;
diff --git a/src/test/java/io/kamax/mxisd/backend/exec/ExecStoreTest.java b/src/test/java/io/kamax/mxisd/test/backend/exec/ExecStoreTest.java
similarity index 98%
rename from src/test/java/io/kamax/mxisd/backend/exec/ExecStoreTest.java
rename to src/test/java/io/kamax/mxisd/test/backend/exec/ExecStoreTest.java
index 7806f21..ac68ca0 100644
--- a/src/test/java/io/kamax/mxisd/backend/exec/ExecStoreTest.java
+++ b/src/test/java/io/kamax/mxisd/test/backend/exec/ExecStoreTest.java
@@ -18,7 +18,7 @@
  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
 
-package io.kamax.mxisd.backend.exec;
+package io.kamax.mxisd.test.backend.exec;
 
 import io.kamax.matrix.MatrixID;
 import io.kamax.matrix._MatrixID;
diff --git a/src/test/java/io/kamax/mxisd/backend/exec/auth/input/ExecAuthArgsTest.java b/src/test/java/io/kamax/mxisd/test/backend/exec/auth/input/ExecAuthArgsTest.java
similarity index 94%
rename from src/test/java/io/kamax/mxisd/backend/exec/auth/input/ExecAuthArgsTest.java
rename to src/test/java/io/kamax/mxisd/test/backend/exec/auth/input/ExecAuthArgsTest.java
index efaa897..c412756 100644
--- a/src/test/java/io/kamax/mxisd/backend/exec/auth/input/ExecAuthArgsTest.java
+++ b/src/test/java/io/kamax/mxisd/test/backend/exec/auth/input/ExecAuthArgsTest.java
@@ -18,9 +18,9 @@
  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
 
-package io.kamax.mxisd.backend.exec.auth.input;
+package io.kamax.mxisd.test.backend.exec.auth.input;
 
-import io.kamax.mxisd.backend.exec.ExecAuthStoreTest;
+import io.kamax.mxisd.test.backend.exec.ExecAuthStoreTest;
 
 import java.util.Arrays;
 
diff --git a/src/test/java/io/kamax/mxisd/backend/exec/auth/input/ExecAuthEnvTest.java b/src/test/java/io/kamax/mxisd/test/backend/exec/auth/input/ExecAuthEnvTest.java
similarity index 95%
rename from src/test/java/io/kamax/mxisd/backend/exec/auth/input/ExecAuthEnvTest.java
rename to src/test/java/io/kamax/mxisd/test/backend/exec/auth/input/ExecAuthEnvTest.java
index fa153aa..658a619 100644
--- a/src/test/java/io/kamax/mxisd/backend/exec/auth/input/ExecAuthEnvTest.java
+++ b/src/test/java/io/kamax/mxisd/test/backend/exec/auth/input/ExecAuthEnvTest.java
@@ -18,9 +18,9 @@
  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
 
-package io.kamax.mxisd.backend.exec.auth.input;
+package io.kamax.mxisd.test.backend.exec.auth.input;
 
-import io.kamax.mxisd.backend.exec.ExecAuthStoreTest;
+import io.kamax.mxisd.test.backend.exec.ExecAuthStoreTest;
 
 import java.util.HashMap;
 
diff --git a/src/test/java/io/kamax/mxisd/backend/exec/auth/input/ExecAuthInputMultilinesTest.java b/src/test/java/io/kamax/mxisd/test/backend/exec/auth/input/ExecAuthInputMultilinesTest.java
similarity index 96%
rename from src/test/java/io/kamax/mxisd/backend/exec/auth/input/ExecAuthInputMultilinesTest.java
rename to src/test/java/io/kamax/mxisd/test/backend/exec/auth/input/ExecAuthInputMultilinesTest.java
index 0b4b7ae..47df55d 100644
--- a/src/test/java/io/kamax/mxisd/backend/exec/auth/input/ExecAuthInputMultilinesTest.java
+++ b/src/test/java/io/kamax/mxisd/test/backend/exec/auth/input/ExecAuthInputMultilinesTest.java
@@ -18,10 +18,10 @@
  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
 
-package io.kamax.mxisd.backend.exec.auth.input;
+package io.kamax.mxisd.test.backend.exec.auth.input;
 
-import io.kamax.mxisd.backend.exec.ExecAuthStoreTest;
 import io.kamax.mxisd.backend.exec.ExecStore;
+import io.kamax.mxisd.test.backend.exec.ExecAuthStoreTest;
 
 public class ExecAuthInputMultilinesTest extends ExecAuthStoreTest {
 
diff --git a/src/test/java/io/kamax/mxisd/test/backend/ldap/LdapAuthTest.java b/src/test/java/io/kamax/mxisd/test/backend/ldap/LdapAuthTest.java
index d0219c7..8ed1c97 100644
--- a/src/test/java/io/kamax/mxisd/test/backend/ldap/LdapAuthTest.java
+++ b/src/test/java/io/kamax/mxisd/test/backend/ldap/LdapAuthTest.java
@@ -43,16 +43,25 @@ public class LdapAuthTest {
     private static InMemoryDirectoryServer ds;
     private static ArrayList<String> dnList = new ArrayList<>();
 
+    private static String domain = "example.org";
+    private static String host = "localhost";
+    private static String mxisdCn = "cn=mxisd";
+    private static String mxisdPw = "mxisd";
+    private static String idType = "uid";
+    private static String idAttribute = "saMAccountName";
+    private static String userId = "john";
+    private static String userPw = "doe";
+
     @BeforeClass
     public static void beforeClass() throws LDAPException {
         dnList.add("dc=1,dc=mxisd,dc=example,dc=org");
         dnList.add("dc=2,dc=mxisd,dc=example,dc=org");
         dnList.add("dc=3,dc=mxisd,dc=example,dc=org");
 
-        InMemoryListenerConfig lCfg = InMemoryListenerConfig.createLDAPConfig("localhost", 65001);
+        InMemoryListenerConfig lCfg = InMemoryListenerConfig.createLDAPConfig(host, 65001);
         InMemoryDirectoryServerConfig config =
                 new InMemoryDirectoryServerConfig(dnList.get(0), dnList.get(1), dnList.get(2));
-        config.addAdditionalBindCredentials("cn=mxisd", "mxisd");
+        config.addAdditionalBindCredentials(mxisdCn, mxisdPw);
         config.setListenerConfigs(lCfg);
 
         ds = new InMemoryDirectoryServer(config);
@@ -67,48 +76,48 @@ public class LdapAuthTest {
     @Test
     public void singleDn() {
         MatrixConfig mxCfg = new MatrixConfig();
-        mxCfg.setDomain("example.org");
+        mxCfg.setDomain(domain);
         mxCfg.build();
 
         LdapConfig cfg = new GenericLdapConfig();
-        cfg.getConnection().setHost("localhost");
+        cfg.getConnection().setHost(host);
         cfg.getConnection().setPort(65001);
         cfg.getConnection().setBaseDn(dnList.get(0));
-        cfg.getConnection().setBindDn("cn=mxisd");
-        cfg.getConnection().setBindPassword("mxisd");
+        cfg.getConnection().setBindDn(mxisdCn);
+        cfg.getConnection().setBindPassword(mxisdPw);
 
         LdapConfig.UID uid = new LdapConfig.UID();
-        uid.setType("uid");
-        uid.setValue("saMAccountName");
+        uid.setType(idType);
+        uid.setValue(idAttribute);
         cfg.getAttribute().setUid(uid);
         cfg.build();
 
         LdapAuthProvider p = new LdapAuthProvider(cfg, mxCfg);
-        BackendAuthResult result = p.authenticate(MatrixID.from("john", "example.org").valid(), "doe");
+        BackendAuthResult result = p.authenticate(MatrixID.from(userId, domain).valid(), userPw);
         assertFalse(result.isSuccess());
     }
 
     @Test
     public void multiDNs() {
         MatrixConfig mxCfg = new MatrixConfig();
-        mxCfg.setDomain("example.org");
+        mxCfg.setDomain(domain);
         mxCfg.build();
 
         LdapConfig cfg = new GenericLdapConfig();
-        cfg.getConnection().setHost("localhost");
+        cfg.getConnection().setHost(host);
         cfg.getConnection().setPort(65001);
         cfg.getConnection().setBaseDNs(dnList);
-        cfg.getConnection().setBindDn("cn=mxisd");
-        cfg.getConnection().setBindPassword("mxisd");
+        cfg.getConnection().setBindDn(mxisdCn);
+        cfg.getConnection().setBindPassword(mxisdPw);
 
         LdapConfig.UID uid = new LdapConfig.UID();
-        uid.setType("uid");
-        uid.setValue("saMAccountName");
+        uid.setType(idType);
+        uid.setValue(idAttribute);
         cfg.getAttribute().setUid(uid);
         cfg.build();
 
         LdapAuthProvider p = new LdapAuthProvider(cfg, mxCfg);
-        BackendAuthResult result = p.authenticate(MatrixID.from("john", "example.org").valid(), "doe");
+        BackendAuthResult result = p.authenticate(MatrixID.from(userId, domain).valid(), userPw);
         assertFalse(result.isSuccess());
     }
 
diff --git a/src/test/java/io/kamax/mxisd/backend/rest/RestDirectoryProviderTest.java b/src/test/java/io/kamax/mxisd/test/backend/rest/RestDirectoryProviderTest.java
similarity index 86%
rename from src/test/java/io/kamax/mxisd/backend/rest/RestDirectoryProviderTest.java
rename to src/test/java/io/kamax/mxisd/test/backend/rest/RestDirectoryProviderTest.java
index 8a75f38..74e9b47 100644
--- a/src/test/java/io/kamax/mxisd/backend/rest/RestDirectoryProviderTest.java
+++ b/src/test/java/io/kamax/mxisd/test/backend/rest/RestDirectoryProviderTest.java
@@ -18,14 +18,16 @@
  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
 
-package io.kamax.mxisd.backend.rest;
+package io.kamax.mxisd.test.backend.rest;
 
 import com.github.tomakehurst.wiremock.junit.WireMockRule;
 import io.kamax.matrix.MatrixID;
+import io.kamax.mxisd.backend.rest.RestDirectoryProvider;
 import io.kamax.mxisd.config.MatrixConfig;
 import io.kamax.mxisd.config.rest.RestBackendConfig;
 import io.kamax.mxisd.http.io.UserDirectorySearchResult;
 import org.apache.commons.lang3.StringUtils;
+import org.apache.http.entity.ContentType;
 import org.junit.Before;
 import org.junit.Rule;
 import org.junit.Test;
@@ -81,7 +83,7 @@ public class RestDirectoryProviderTest {
     public void byNameFound() {
         stubFor(post(urlEqualTo(endpoint))
                 .willReturn(aResponse()
-                        .withHeader("Content-Type", "application/json")
+                        .withHeader("Content-Type", ContentType.APPLICATION_JSON.getMimeType())
                         .withBody(byNameResponse)
                 )
         );
@@ -96,7 +98,7 @@ public class RestDirectoryProviderTest {
         assertTrue(StringUtils.equals(MatrixID.asAcceptable(byNameId, domain).getId(), entry.getUserId()));
 
         verify(postRequestedFor(urlMatching(endpoint))
-                .withHeader("Content-Type", containing("application/json"))
+                .withHeader("Content-Type", containing(ContentType.APPLICATION_JSON.getMimeType()))
                 .withRequestBody(equalTo(byNameRequest))
         );
     }
@@ -105,7 +107,7 @@ public class RestDirectoryProviderTest {
     public void byNameNotFound() {
         stubFor(post(urlEqualTo(endpoint))
                 .willReturn(aResponse()
-                        .withHeader("Content-Type", "application/json")
+                        .withHeader("Content-Type", ContentType.APPLICATION_JSON.getMimeType())
                         .withBody(byNameEmptyResponse)
                 )
         );
@@ -115,7 +117,7 @@ public class RestDirectoryProviderTest {
         assertTrue(result.getResults().isEmpty());
 
         verify(postRequestedFor(urlMatching(endpoint))
-                .withHeader("Content-Type", containing("application/json"))
+                .withHeader("Content-Type", containing(ContentType.APPLICATION_JSON.getMimeType()))
                 .withRequestBody(equalTo(byNameRequest))
         );
     }
@@ -124,7 +126,7 @@ public class RestDirectoryProviderTest {
     public void byThreepidFound() {
         stubFor(post(urlEqualTo(endpoint))
                 .willReturn(aResponse()
-                        .withHeader("Content-Type", "application/json")
+                        .withHeader("Content-Type", ContentType.APPLICATION_JSON.getMimeType())
                         .withBody(new String(byThreepidResponse.getBytes(StandardCharsets.UTF_8), StandardCharsets.UTF_8))
                 )
         );
@@ -139,7 +141,7 @@ public class RestDirectoryProviderTest {
         assertTrue(StringUtils.equals(MatrixID.asAcceptable(byThreepidId, domain).getId(), entry.getUserId()));
 
         verify(postRequestedFor(urlMatching(endpoint))
-                .withHeader("Content-Type", containing("application/json"))
+                .withHeader("Content-Type", containing(ContentType.APPLICATION_JSON.getMimeType()))
                 .withRequestBody(equalTo(byThreepidRequest))
         );
     }
@@ -148,7 +150,7 @@ public class RestDirectoryProviderTest {
     public void byThreepidNotFound() {
         stubFor(post(urlEqualTo(endpoint))
                 .willReturn(aResponse()
-                        .withHeader("Content-Type", "application/json")
+                        .withHeader("Content-Type", ContentType.APPLICATION_JSON.getMimeType())
                         .withBody(byThreepidEmptyResponse)
                 )
         );
@@ -158,7 +160,7 @@ public class RestDirectoryProviderTest {
         assertTrue(result.getResults().isEmpty());
 
         verify(postRequestedFor(urlMatching(endpoint))
-                .withHeader("Content-Type", containing("application/json"))
+                .withHeader("Content-Type", containing(ContentType.APPLICATION_JSON.getMimeType()))
                 .withRequestBody(equalTo(byThreepidRequest))
         );
     }
diff --git a/src/test/java/io/kamax/mxisd/backend/rest/RestProfileProviderTest.java b/src/test/java/io/kamax/mxisd/test/backend/rest/RestProfileProviderTest.java
similarity index 98%
rename from src/test/java/io/kamax/mxisd/backend/rest/RestProfileProviderTest.java
rename to src/test/java/io/kamax/mxisd/test/backend/rest/RestProfileProviderTest.java
index fd1afeb..1cbd74e 100644
--- a/src/test/java/io/kamax/mxisd/backend/rest/RestProfileProviderTest.java
+++ b/src/test/java/io/kamax/mxisd/test/backend/rest/RestProfileProviderTest.java
@@ -18,12 +18,13 @@
  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
 
-package io.kamax.mxisd.backend.rest;
+package io.kamax.mxisd.test.backend.rest;
 
 import com.github.tomakehurst.wiremock.junit.WireMockRule;
 import io.kamax.matrix.MatrixID;
 import io.kamax.matrix._MatrixID;
 import io.kamax.matrix.json.GsonUtil;
+import io.kamax.mxisd.backend.rest.RestProfileProvider;
 import io.kamax.mxisd.config.rest.RestBackendConfig;
 import io.kamax.mxisd.exception.InternalServerError;
 import io.kamax.mxisd.profile.JsonProfileRequest;
diff --git a/src/test/java/io/kamax/mxisd/backend/rest/RestThreePidProviderTest.java b/src/test/java/io/kamax/mxisd/test/backend/rest/RestThreePidProviderTest.java
similarity index 85%
rename from src/test/java/io/kamax/mxisd/backend/rest/RestThreePidProviderTest.java
rename to src/test/java/io/kamax/mxisd/test/backend/rest/RestThreePidProviderTest.java
index 97dda60..488e6f0 100644
--- a/src/test/java/io/kamax/mxisd/backend/rest/RestThreePidProviderTest.java
+++ b/src/test/java/io/kamax/mxisd/test/backend/rest/RestThreePidProviderTest.java
@@ -1,13 +1,15 @@
-package io.kamax.mxisd.backend.rest;
+package io.kamax.mxisd.test.backend.rest;
 
 import com.github.tomakehurst.wiremock.junit.WireMockRule;
 import io.kamax.matrix.ThreePidMedium;
+import io.kamax.mxisd.backend.rest.RestThreePidProvider;
 import io.kamax.mxisd.config.MatrixConfig;
 import io.kamax.mxisd.config.rest.RestBackendConfig;
 import io.kamax.mxisd.lookup.SingleLookupReply;
 import io.kamax.mxisd.lookup.SingleLookupRequest;
 import io.kamax.mxisd.lookup.ThreePidMapping;
 import org.apache.commons.lang.StringUtils;
+import org.apache.http.entity.ContentType;
 import org.junit.Before;
 import org.junit.Rule;
 import org.junit.Test;
@@ -17,6 +19,7 @@ import java.util.List;
 import java.util.Optional;
 
 import static com.github.tomakehurst.wiremock.client.WireMock.*;
+import static junit.framework.TestCase.assertEquals;
 import static org.junit.Assert.assertNotNull;
 import static org.junit.Assert.assertTrue;
 
@@ -78,7 +81,7 @@ public class RestThreePidProviderTest {
     public void lookupSingleFound() {
         stubFor(post(urlEqualTo(lookupSinglePath))
                 .willReturn(aResponse()
-                        .withHeader("Content-Type", "application/json")
+                        .withHeader("Content-Type", ContentType.APPLICATION_JSON.getMimeType())
                         .withBody(lookupSingleFoundBody)
                 )
         );
@@ -91,7 +94,7 @@ public class RestThreePidProviderTest {
         });
 
         verify(postRequestedFor(urlMatching("/lookup/single"))
-                .withHeader("Content-Type", containing("application/json"))
+                .withHeader("Content-Type", containing(ContentType.APPLICATION_JSON.getMimeType()))
                 .withRequestBody(equalTo(lookupSingleRequestBody))
         );
     }
@@ -100,7 +103,7 @@ public class RestThreePidProviderTest {
     public void lookupSingleNotFound() {
         stubFor(post(urlEqualTo(lookupSinglePath))
                 .willReturn(aResponse()
-                        .withHeader("Content-Type", "application/json")
+                        .withHeader("Content-Type", ContentType.APPLICATION_JSON.getMimeType())
                         .withBody(lookupSingleNotFoundBody)
                 )
         );
@@ -109,7 +112,7 @@ public class RestThreePidProviderTest {
         assertTrue(!rep.isPresent());
 
         verify(postRequestedFor(urlMatching("/lookup/single"))
-                .withHeader("Content-Type", containing("application/json"))
+                .withHeader("Content-Type", containing(ContentType.APPLICATION_JSON.getMimeType()))
                 .withRequestBody(equalTo(lookupSingleRequestBody))
         );
     }
@@ -118,14 +121,14 @@ public class RestThreePidProviderTest {
     public void lookupBulkFound() {
         stubFor(post(urlEqualTo(lookupBulkPath))
                 .willReturn(aResponse()
-                        .withHeader("Content-Type", "application/json")
+                        .withHeader("Content-Type", ContentType.APPLICATION_JSON.getMimeType())
                         .withBody(lookupBulkFoundBody)
                 )
         );
 
         List<ThreePidMapping> mappings = p.populate(lookupBulkList);
         assertNotNull(mappings);
-        assertTrue(mappings.size() == 2);
+        assertEquals(2, mappings.size());
         assertTrue(StringUtils.equals(mappings.get(0).getMxid(), "@john:example.org"));
         assertTrue(StringUtils.equals(mappings.get(1).getMxid(), "@jane:example.org"));
     }
@@ -134,14 +137,14 @@ public class RestThreePidProviderTest {
     public void lookupBulkNotFound() {
         stubFor(post(urlEqualTo(lookupBulkPath))
                 .willReturn(aResponse()
-                        .withHeader("Content-Type", "application/json")
+                        .withHeader("Content-Type", ContentType.APPLICATION_JSON.getMimeType())
                         .withBody(lookupBulkNotFoundBody)
                 )
         );
 
         List<ThreePidMapping> mappings = p.populate(lookupBulkList);
         assertNotNull(mappings);
-        assertTrue(mappings.size() == 0);
+        assertEquals(0, mappings.size());
     }
 
 }