diff --git a/index.js b/index.js
index e2d6fd4..93fca5d 100644
--- a/index.js
+++ b/index.js
@@ -46,6 +46,16 @@ module.exports = {
     "declaration-no-important": true,
     "declaration-property-unit-allowed-list": {
       "font-size": ["px", "em"]
-    }
+    },
+
+    // bem
+    // https://github.com/postcss/postcss-bem-linter/issues/82#issuecomment-193851353
+    "selector-class-pattern": [
+      "^(?:(?:o|c|u|t|s|is|has|_|js|qa)-)?[a-zA-Z0-9]+(?:-[a-zA-Z0-9]+)*(?:__[a-zA-Z0-9]+(?:-[a-zA-Z0-9]+)*)?(?:--[a-zA-Z0-9]+(?:-[a-zA-Z0-9]+)*){0,2}(?:\\[.+\\])?$",
+      {
+        "message": "Expected class selector to match BEM naming convention",
+        "resolveNestedSelectors": true
+      }
+    ]
   }
 };
\ No newline at end of file
diff --git a/test/index.scss b/test/index.scss
index 3c7c22c..8db1369 100644
--- a/test/index.scss
+++ b/test/index.scss
@@ -5,10 +5,10 @@
 
 /* max-nesting-depth: 3 */
 .parent {
-  &__nested1 {
-    &__nested2 {
-      &__nested3 {
-        &__nested4 {
+  &Nested1 {
+    &Nested2 {
+      &Nested3 {
+        &Nested4 {
           background: red;
         }
       }
@@ -23,3 +23,62 @@
 .unsuported {
   display: flex;
 }
+
+/* bem ok */
+.block {
+  color: test;
+
+  &-header {
+    color: test;
+  }
+
+  &__element {
+    color: test;
+
+    &Suffix {
+      color: test;
+    }
+
+    &-suffix {
+      color: test;
+    }
+
+    &--modifier {
+      color: test;
+
+      &--modifier2 {
+        color: test;
+      }
+    }
+  }
+}
+
+/* bem error */
+.block__element2 {
+  color: test;
+
+  // not '_' allowed
+  &_suffix {
+    color: test;
+  }
+
+  // 2 nested elements
+  &__subElement {
+    color: test;
+  }
+
+  &--modifier {
+    color: test;
+
+    &--modifier2 {
+      color: test;
+
+      // 3 modifiers
+      &--modifier3 {
+        color: test;
+      }
+    }
+  }
+}
+
+/** end */
\ No newline at end of file