diff --git a/builtin/core.wren b/builtin/core.wren
index 8dae8aca..fe501afe 100644
--- a/builtin/core.wren
+++ b/builtin/core.wren
@@ -1,4 +1,13 @@
 class Sequence {
+  contains(element) {
+    for (item in this) {
+      if (element == item) {
+        return true
+      }
+    }
+    return false
+  }
+
   count {
     var result = 0
     for (element in this) {
@@ -92,15 +101,6 @@ class List is Sequence {
     }
     return result
   }
-
-  contains(element) {
-    for (item in this) {
-      if (element == item) {
-        return true
-      }
-    }
-    return false
-  }
 }
 
 class Map {
diff --git a/doc/site/core/sequence.markdown b/doc/site/core/sequence.markdown
index a36e394b..a7bac5e9 100644
--- a/doc/site/core/sequence.markdown
+++ b/doc/site/core/sequence.markdown
@@ -30,6 +30,10 @@ Otherwise, returns `false`.
     [1, 2, 3].any {|n| n < 1} // False.
     [1, 2, 3].any {|n| n > 2} // True.
 
+### **contains**(element)
+
+Returns whether the sequence contains any element equal to the given element.
+
 ### **join**(sep)
 
 Returns a string representation of the list. The string representations of the
diff --git a/src/vm/wren_core.c b/src/vm/wren_core.c
index 62212e34..853fb738 100644
--- a/src/vm/wren_core.c
+++ b/src/vm/wren_core.c
@@ -45,6 +45,15 @@
 // This string literal is generated automatically from core. Do not edit.
 static const char* libSource =
 "class Sequence {\n"
+"  contains(element) {\n"
+"    for (item in this) {\n"
+"      if (element == item) {\n"
+"        return true\n"
+"      }\n"
+"    }\n"
+"    return false\n"
+"  }\n"
+"\n"
 "  count {\n"
 "    var result = 0\n"
 "    for (element in this) {\n"
@@ -138,15 +147,6 @@ static const char* libSource =
 "    }\n"
 "    return result\n"
 "  }\n"
-"\n"
-"  contains(element) {\n"
-"    for (item in this) {\n"
-"      if (element == item) {\n"
-"        return true\n"
-"      }\n"
-"    }\n"
-"    return false\n"
-"  }\n"
 "}\n"
 "\n"
 "class Map {\n"
diff --git a/test/core/list/contains.wren b/test/core/list/contains.wren
new file mode 100644
index 00000000..8ceae4d0
--- /dev/null
+++ b/test/core/list/contains.wren
@@ -0,0 +1,6 @@
+var list = [1, 2, 3, 4, "foo"]
+
+IO.print(list.contains(2))      // expect: true
+IO.print(list.contains(5))      // expect: false
+IO.print(list.contains("foo"))  // expect: true
+IO.print(list.contains("bar"))  // expect: false
diff --git a/test/core/range/contains.wren b/test/core/range/contains.wren
new file mode 100644
index 00000000..97189ef6
--- /dev/null
+++ b/test/core/range/contains.wren
@@ -0,0 +1,23 @@
+// Ordered range.
+IO.print((2..5).contains(1)) // expect: false
+IO.print((2..5).contains(2)) // expect: true
+IO.print((2..5).contains(5)) // expect: true
+IO.print((2..5).contains(6)) // expect: false
+
+// Backwards range.
+IO.print((5..2).contains(1)) // expect: false
+IO.print((5..2).contains(2)) // expect: true
+IO.print((5..2).contains(5)) // expect: true
+IO.print((5..2).contains(6)) // expect: false
+
+// Exclusive ordered range.
+IO.print((2...5).contains(1)) // expect: false
+IO.print((2...5).contains(2)) // expect: true
+IO.print((2...5).contains(5)) // expect: false
+IO.print((2...5).contains(6)) // expect: false
+
+// Exclusive backwards range.
+IO.print((5...2).contains(1)) // expect: false
+IO.print((5...2).contains(2)) // expect: false
+IO.print((5...2).contains(5)) // expect: true
+IO.print((5...2).contains(6)) // expect: false