diff --git a/archunit/src/main/java/com/tngtech/archunit/ArchConfiguration.java b/archunit/src/main/java/com/tngtech/archunit/ArchConfiguration.java
index deb1d1d965..9d7e141e42 100644
--- a/archunit/src/main/java/com/tngtech/archunit/ArchConfiguration.java
+++ b/archunit/src/main/java/com/tngtech/archunit/ArchConfiguration.java
@@ -35,13 +35,14 @@
 
 import static com.google.common.base.Preconditions.checkNotNull;
 import static com.tngtech.archunit.PublicAPI.Usage.ACCESS;
+import static com.tngtech.archunit.base.ClassLoaders.getCurrentClassLoader;
 
 /**
  * Allows access to configured properties in {@value ARCHUNIT_PROPERTIES_RESOURCE_NAME}.
  */
 public final class ArchConfiguration {
     @Internal // {@value ...} does not work on non public constants outside of the package
-    public static final String ARCHUNIT_PROPERTIES_RESOURCE_NAME = "/archunit.properties";
+    public static final String ARCHUNIT_PROPERTIES_RESOURCE_NAME = "archunit.properties";
     @Internal // {@value ...} does not work on non public constants outside of the package
     public static final String RESOLVE_MISSING_DEPENDENCIES_FROM_CLASS_PATH = "resolveMissingDependenciesFromClassPath";
     static final String CLASS_RESOLVER = "classResolver";
@@ -84,7 +85,7 @@ private ArchConfiguration(String propertiesResourceName) {
     private void readProperties(String propertiesResourceName) {
         properties.clear();
 
-        URL archUnitPropertiesUrl = getClass().getResource(propertiesResourceName);
+        URL archUnitPropertiesUrl = getCurrentClassLoader(getClass()).getResource(propertiesResourceName);
         if (archUnitPropertiesUrl == null) {
             LOG.debug("No configuration found in classpath at {} => Using default configuration", propertiesResourceName);
             return;
diff --git a/archunit/src/main/java/com/tngtech/archunit/lang/ArchRule.java b/archunit/src/main/java/com/tngtech/archunit/lang/ArchRule.java
index e3f568f96a..b55a214bf8 100644
--- a/archunit/src/main/java/com/tngtech/archunit/lang/ArchRule.java
+++ b/archunit/src/main/java/com/tngtech/archunit/lang/ArchRule.java
@@ -38,6 +38,7 @@
 
 import static com.google.common.io.Resources.readLines;
 import static com.tngtech.archunit.PublicAPI.Usage.ACCESS;
+import static com.tngtech.archunit.base.ClassLoaders.getCurrentClassLoader;
 import static java.nio.charset.StandardCharsets.UTF_8;
 
 /**
@@ -107,7 +108,7 @@ public boolean apply(String message) {
         }
 
         private static Set<Pattern> readPatternsFrom(String fileNameInClassPath) {
-            URL ignorePatternsResource = Assertions.class.getResource('/' + fileNameInClassPath);
+            URL ignorePatternsResource = getCurrentClassLoader(Assertions.class).getResource(fileNameInClassPath);
             if (ignorePatternsResource == null) {
                 return Collections.emptySet();
             }
diff --git a/archunit/src/test/java/com/tngtech/archunit/ArchConfigurationTest.java b/archunit/src/test/java/com/tngtech/archunit/ArchConfigurationTest.java
index 8681217798..09c9baeb38 100644
--- a/archunit/src/test/java/com/tngtech/archunit/ArchConfigurationTest.java
+++ b/archunit/src/test/java/com/tngtech/archunit/ArchConfigurationTest.java
@@ -23,7 +23,6 @@
 
 public class ArchConfigurationTest {
     private static final String PROPERTIES_FILE_NAME = "archconfigtest.properties";
-    private static final String PROPERTIES_RESOURCE_NAME = "/" + PROPERTIES_FILE_NAME;
     private final File testPropsFile = new File(getClass().getResource("/").getFile(), PROPERTIES_FILE_NAME);
 
     @Rule
@@ -50,7 +49,7 @@ public void missing_property_file() {
     public void empty_property_file() {
         writeProperties(Collections.<String, String>emptyMap());
 
-        assertDefault(testConfiguration(PROPERTIES_RESOURCE_NAME));
+        assertDefault(testConfiguration(PROPERTIES_FILE_NAME));
     }
 
     @Test
@@ -60,7 +59,7 @@ public void simple_properties_explicitly_set() {
                 ArchConfiguration.ENABLE_MD5_IN_CLASS_SOURCES, true
         ));
 
-        ArchConfiguration configuration = testConfiguration(PROPERTIES_RESOURCE_NAME);
+        ArchConfiguration configuration = testConfiguration(PROPERTIES_FILE_NAME);
 
         assertThat(configuration.resolveMissingDependenciesFromClassPath()).isTrue();
         assertThat(configuration.md5InClassSourcesEnabled()).isTrue();
@@ -75,7 +74,7 @@ public void resolver_explicitly_set() {
                 ArchConfiguration.CLASS_RESOLVER_ARGS, "one.foo,two.bar"
         ));
 
-        ArchConfiguration configuration = testConfiguration(PROPERTIES_RESOURCE_NAME);
+        ArchConfiguration configuration = testConfiguration(PROPERTIES_FILE_NAME);
 
         assertThat(configuration.getClassResolver()).contains("some.Resolver");
         assertThat(configuration.getClassResolverArguments()).containsExactly("one.foo", "two.bar");
@@ -83,7 +82,7 @@ public void resolver_explicitly_set() {
 
     @Test
     public void reset_works() {
-        ArchConfiguration configuration = testConfiguration(PROPERTIES_RESOURCE_NAME);
+        ArchConfiguration configuration = testConfiguration(PROPERTIES_FILE_NAME);
         assertThat(configuration.resolveMissingDependenciesFromClassPath()).isTrue();
 
         configuration.setResolveMissingDependenciesFromClassPath(false);
@@ -102,7 +101,7 @@ public void global_access_to_configuration_has_no_error() {
 
     @Test
     public void can_set_extension_properties() {
-        ArchConfiguration configuration = testConfiguration(PROPERTIES_RESOURCE_NAME);
+        ArchConfiguration configuration = testConfiguration(PROPERTIES_FILE_NAME);
 
         configuration.setExtensionProperties("test", singleProperty("key", "value"));
 
@@ -112,7 +111,7 @@ public void can_set_extension_properties() {
 
     @Test
     public void set_extension_properties_are_copied() {
-        ArchConfiguration configuration = testConfiguration(PROPERTIES_RESOURCE_NAME);
+        ArchConfiguration configuration = testConfiguration(PROPERTIES_FILE_NAME);
 
         Properties properties = singleProperty("key", "value");
         configuration.setExtensionProperties("test", properties);
@@ -124,7 +123,7 @@ public void set_extension_properties_are_copied() {
 
     @Test
     public void can_change_extension_properties() {
-        ArchConfiguration configuration = testConfiguration(PROPERTIES_RESOURCE_NAME);
+        ArchConfiguration configuration = testConfiguration(PROPERTIES_FILE_NAME);
 
         configuration.setExtensionProperties("test",
                 properties("one", "valueOne", "two", "valueTwo"));
@@ -141,14 +140,14 @@ public void can_change_extension_properties() {
 
     @Test
     public void if_no_extension_properties_are_found_empty_properties_are_returned() {
-        ArchConfiguration configuration = testConfiguration(PROPERTIES_RESOURCE_NAME);
+        ArchConfiguration configuration = testConfiguration(PROPERTIES_FILE_NAME);
 
         assertThat(configuration.getExtensionProperties("not-there")).isEmpty();
     }
 
     @Test
     public void returned_properties_are_copied() {
-        ArchConfiguration configuration = testConfiguration(PROPERTIES_RESOURCE_NAME);
+        ArchConfiguration configuration = testConfiguration(PROPERTIES_FILE_NAME);
 
         String original = "value";
         configuration.setExtensionProperties("test", singleProperty("key", original));
@@ -171,7 +170,7 @@ public void creates_extension_properties_from_prefix() {
                 "extension.other-extension.other-prop", "other value"
         ));
 
-        ArchConfiguration configuration = testConfiguration(PROPERTIES_RESOURCE_NAME);
+        ArchConfiguration configuration = testConfiguration(PROPERTIES_FILE_NAME);
 
         Properties properties = configuration.getExtensionProperties("test-extension");
         assertThat(properties).containsOnly(
@@ -190,7 +189,7 @@ public void allows_to_specify_custom_properties() {
                 "toignore", "toignore"
         ));
 
-        ArchConfiguration configuration = testConfiguration(PROPERTIES_RESOURCE_NAME);
+        ArchConfiguration configuration = testConfiguration(PROPERTIES_FILE_NAME);
 
         assertThat(configuration.getProperty("some.custom.booleanproperty")).isEqualTo("true");
         assertThat(configuration.getSubProperties("some.custom"))