diff --git a/webtau-core-groovy/src/test/groovy/org/testingisdocumenting/webtau/expectation/equality/handlers/MapMatchersGroovyExamplesTest.groovy b/webtau-core-groovy/src/test/groovy/org/testingisdocumenting/webtau/expectation/equality/handlers/MapMatchersGroovyExamplesTest.groovy
index 6a33f1f3d..5b9397ef6 100644
--- a/webtau-core-groovy/src/test/groovy/org/testingisdocumenting/webtau/expectation/equality/handlers/MapMatchersGroovyExamplesTest.groovy
+++ b/webtau-core-groovy/src/test/groovy/org/testingisdocumenting/webtau/expectation/equality/handlers/MapMatchersGroovyExamplesTest.groovy
@@ -33,6 +33,16 @@ class MapMatchersGroovyExamplesTest {
         } should throwException(AssertionError)
     }
 
+    @Test
+    void containsMismatch() {
+        code {
+            // maps-contain-mismatch
+            Map<String, ?> generated = generate()
+            generated.should contain(firstName: "G-FN", lastName: "G-LN", middleName: "G-MN")
+            // maps-contain-mismatch
+        } should throwException(AssertionError)
+    }
+
     private static Map<String, ?> generate() {
         return map("firstName", "G-FN", "lastName", "G-LN",
                 "address", map("street", "generated-street", "city", "GenSity"))
diff --git a/webtau-core/src/test/java/org/testingisdocumenting/webtau/expectation/equality/handlers/MapMatchersJavaExamplesTest.java b/webtau-core/src/test/java/org/testingisdocumenting/webtau/expectation/equality/handlers/MapMatchersJavaExamplesTest.java
index 5058a13c8..79248f746 100644
--- a/webtau-core/src/test/java/org/testingisdocumenting/webtau/expectation/equality/handlers/MapMatchersJavaExamplesTest.java
+++ b/webtau-core/src/test/java/org/testingisdocumenting/webtau/expectation/equality/handlers/MapMatchersJavaExamplesTest.java
@@ -56,6 +56,25 @@ public void equalityMismatch() {
         });
     }
 
+    @Test
+    public void containMismatch() {
+        runExpectExceptionCaptureAndValidateOutput(AssertionError.class, "maps-contain-console-output", """
+                X failed expecting [value] to contain {"firstName": "G-FN", "lastName": "G-LN", "middleName": "G-MD"}: no match found (Xms)
+                 \s
+                  {
+                    "firstName": "G-FN",
+                    "lastName": "G-LN",
+                    "address": {"street": "generated-street", "city": "GenSity"},
+                    "middleName": **<missing>**
+                  }""", () -> {
+            // maps-contain-mismatch
+            Map<String, ?> generated = generate();
+            actual(generated).should(contain(
+                    map("firstName", "G-FN", "lastName", "G-LN", "middleName", "G-MD")));
+            // maps-contain-mismatch
+        });
+    }
+
     private static Map<String, ?> generate() {
         return map("firstName", "G-FN", "lastName", "G-LN",
                 "address", map("street", "generated-street", "city", "GenSity"));
diff --git a/webtau-docs/znai/matchers/maps.md b/webtau-docs/znai/matchers/maps.md
index e07d8443b..639ea0263 100644
--- a/webtau-docs/znai/matchers/maps.md
+++ b/webtau-docs/znai/matchers/maps.md
@@ -16,3 +16,22 @@ Java:
 :include-cli-output: doc-artifacts/maps-equal-console-output.txt {
   title: "console output"
 }
+
+# Contain
+
+Use `contain` matcher to check if one map is a subset of another:
+
+```tabs
+Groovy:
+:include-file: org/testingisdocumenting/webtau/expectation/equality/handlers/MapMatchersGroovyExamplesTest.groovy {
+  surroundedBy: "maps-contain-mismatch"
+}
+Java:
+:include-file: org/testingisdocumenting/webtau/expectation/equality/handlers/MapMatchersJavaExamplesTest.java {
+  surroundedBy: "maps-contain-mismatch"
+}
+```
+
+:include-cli-output: doc-artifacts/maps-contain-console-output.txt {
+  title: "console output"
+}
diff --git a/webtau-docs/znai/release-notes/2.1/add-2023-08-02-map-equality-missing-display.md b/webtau-docs/znai/release-notes/2.1/add-2023-08-02-map-equality-missing-display.md
index b71997ee5..35be2ee97 100644
--- a/webtau-docs/znai/release-notes/2.1/add-2023-08-02-map-equality-missing-display.md
+++ b/webtau-docs/znai/release-notes/2.1/add-2023-08-02-map-equality-missing-display.md
@@ -1 +1 @@
-* Add: [Map Comparison](matchers/maps) displays missing keys inlined
+* Add: [Map Equal](matchers/maps#equality-comparison) displays missing keys inlined
diff --git a/webtau-docs/znai/release-notes/2.1/add-2023-08-03-map-contain-missing-display.md b/webtau-docs/znai/release-notes/2.1/add-2023-08-03-map-contain-missing-display.md
new file mode 100644
index 000000000..c6077478f
--- /dev/null
+++ b/webtau-docs/znai/release-notes/2.1/add-2023-08-03-map-contain-missing-display.md
@@ -0,0 +1 @@
+* Add: [Map Contain](matchers/maps#contain) displays missing keys inlined