diff --git a/README.md b/README.md
index d29c67e35..47bbbbd1d 100644
--- a/README.md
+++ b/README.md
@@ -1501,7 +1501,7 @@ then it will come in handy:
 
 ```kotlin
 expect(linkedMapOf("a" to 1, "b" to 2)).asEntries().toContain.inOrder.only.entries(
-    { isKeyValue("a", 1) },
+    { toEqualKeyValue("a", 1) },
     {
         key.toStartWith("a")
         value.toBeGreaterThan(2)
@@ -1526,7 +1526,7 @@ expected that subject: {a=1, b=2}        (java.util.LinkedHashMap <1234789>)
 ```
 </ex-map-5>
 
-`isKeyValue` as well as `key` and `value` are assertion functions defined for `Map.Entry<K, V>`.
+`toEqualKeyValue` as well as `key` and `value` are assertion functions defined for `Map.Entry<K, V>`.
 
 There are more assertion functions, a full list can be found in 
 [KDoc of atrium-api-fluent-en_GB](https://docs.atriumlib.org/latest#/doc/ch.tutteli.atrium.api.fluent.en_-g-b/index.html).
diff --git a/apis/fluent-en_GB/atrium-api-fluent-en_GB-common/src/main/kotlin/ch/tutteli/atrium/api/fluent/en_GB/mapEntryAssertions.kt b/apis/fluent-en_GB/atrium-api-fluent-en_GB-common/src/main/kotlin/ch/tutteli/atrium/api/fluent/en_GB/mapEntryAssertions.kt
index 8d115b751..8c3f43aa2 100644
--- a/apis/fluent-en_GB/atrium-api-fluent-en_GB-common/src/main/kotlin/ch/tutteli/atrium/api/fluent/en_GB/mapEntryAssertions.kt
+++ b/apis/fluent-en_GB/atrium-api-fluent-en_GB-common/src/main/kotlin/ch/tutteli/atrium/api/fluent/en_GB/mapEntryAssertions.kt
@@ -15,6 +15,7 @@ import ch.tutteli.atrium.logic.*
  *
  * @sample ch.tutteli.atrium.api.fluent.en_GB.samples.deprecated.MapEntryAssertionSamples.isKeyValue
  */
+@Deprecated("Use toEqualKeyValue; will be removed with 1.0.0 at the latest", ReplaceWith("toEqualKeyValue(key, value)"))
 fun <K, V, T : Map.Entry<K, V>> Expect<T>.isKeyValue(key: K, value: V): Expect<T> =
     _logicAppend { isKeyValue(key, value) }
 
diff --git a/apis/fluent-en_GB/atrium-api-fluent-en_GB-common/src/test/kotlin/ch/tutteli/atrium/api/fluent/en_GB/MapEntryExpectationsSpec.kt b/apis/fluent-en_GB/atrium-api-fluent-en_GB-common/src/test/kotlin/ch/tutteli/atrium/api/fluent/en_GB/MapEntryExpectationsSpec.kt
index fb0aadde5..6c76216b5 100644
--- a/apis/fluent-en_GB/atrium-api-fluent-en_GB-common/src/test/kotlin/ch/tutteli/atrium/api/fluent/en_GB/MapEntryExpectationsSpec.kt
+++ b/apis/fluent-en_GB/atrium-api-fluent-en_GB-common/src/test/kotlin/ch/tutteli/atrium/api/fluent/en_GB/MapEntryExpectationsSpec.kt
@@ -24,16 +24,16 @@ object MapEntryExpectationsSpec : ch.tutteli.atrium.specs.integration.MapEntryEx
 
         var star: Expect<Map.Entry<*, *>> = notImplemented()
 
-        a1.isKeyValue("a", 1)
-        a2.isKeyValue("a", 1)
-        a3.isKeyValue("a", 1)
-        a4.isKeyValue("a", 1)
-        star.isKeyValue("a", 1)
+        a1.toEqualKeyValue("a", 1)
+        a2.toEqualKeyValue("a", 1)
+        a3.toEqualKeyValue("a", 1)
+        a4.toEqualKeyValue("a", 1)
+        star.toEqualKeyValue("a", 1)
 
-        a2.isKeyValue(null, 1)
-        a3.isKeyValue("a", null)
-        a4.isKeyValue(null, null)
-        star.isKeyValue(null, null)
+        a2.toEqualKeyValue(null, 1)
+        a3.toEqualKeyValue("a", null)
+        a4.toEqualKeyValue(null, null)
+        star.toEqualKeyValue(null, null)
 
         a1.key
         a2.key
diff --git a/apis/fluent-en_GB/atrium-api-fluent-en_GB-common/src/test/kotlin/ch/tutteli/atrium/api/fluent/en_GB/samples/deprecated/MapEntryAssertionSamples.kt b/apis/fluent-en_GB/atrium-api-fluent-en_GB-common/src/test/kotlin/ch/tutteli/atrium/api/fluent/en_GB/samples/deprecated/MapEntryAssertionSamples.kt
index 1224f8192..a13454512 100644
--- a/apis/fluent-en_GB/atrium-api-fluent-en_GB-common/src/test/kotlin/ch/tutteli/atrium/api/fluent/en_GB/samples/deprecated/MapEntryAssertionSamples.kt
+++ b/apis/fluent-en_GB/atrium-api-fluent-en_GB-common/src/test/kotlin/ch/tutteli/atrium/api/fluent/en_GB/samples/deprecated/MapEntryAssertionSamples.kt
@@ -12,10 +12,10 @@ class MapEntryAssertionSamples {
 
     @Test
     fun isKeyValue() {
-        expect(mapOf(1 to "a").entries.first()).isKeyValue(1, "a")
+        expect(mapOf(1 to "a").entries.first()).toEqualKeyValue(1, "a")
 
         fails {
-            expect(mapOf(1 to "a").entries.first()).isKeyValue(1, "b")
+            expect(mapOf(1 to "a").entries.first()).toEqualKeyValue(1, "b")
         }
     }
 
diff --git a/bundles/fluent-en_GB/atrium-fluent-en_GB-js/src/test/kotlin/ch/tutteli/atrium/fluent/en_GB/JsNameAmbiguityTest.kt b/bundles/fluent-en_GB/atrium-fluent-en_GB-js/src/test/kotlin/ch/tutteli/atrium/fluent/en_GB/JsNameAmbiguityTest.kt
index 890d9ae54..70c41fc1a 100644
--- a/bundles/fluent-en_GB/atrium-fluent-en_GB-js/src/test/kotlin/ch/tutteli/atrium/fluent/en_GB/JsNameAmbiguityTest.kt
+++ b/bundles/fluent-en_GB/atrium-fluent-en_GB-js/src/test/kotlin/ch/tutteli/atrium/fluent/en_GB/JsNameAmbiguityTest.kt
@@ -19,7 +19,7 @@ class JsNameAmbiguityTest {
     @Test
     fun isKeyValueNullable() {
         expect(mapOf(1 to null as Int?)).asEntries().toContainExactly {
-            isKeyValue(1, null)
+            toEqualKeyValue(1, null)
         }
     }
 }
diff --git a/misc/specs/atrium-specs-common/src/main/kotlin/ch/tutteli/atrium/specs/integration/MapAsEntriesExpectationsSpec.kt b/misc/specs/atrium-specs-common/src/main/kotlin/ch/tutteli/atrium/specs/integration/MapAsEntriesExpectationsSpec.kt
index ca25bff38..1420ad7d0 100644
--- a/misc/specs/atrium-specs-common/src/main/kotlin/ch/tutteli/atrium/specs/integration/MapAsEntriesExpectationsSpec.kt
+++ b/misc/specs/atrium-specs-common/src/main/kotlin/ch/tutteli/atrium/specs/integration/MapAsEntriesExpectationsSpec.kt
@@ -29,7 +29,7 @@ abstract class MapAsEntriesExpectationsSpec(
             it("$name - transformation can be applied and an assertion made") {
                 expect(mapOf("a" to 1, "b" to 2)).asEntriesFun {
                     toContain.inAnyOrder.only.entries(
-                        { isKeyValue("b", 2) },
+                        { toEqualKeyValue("b", 2) },
                         {
                             key.toStartWith("a")
                             value.toBeGreaterThanOrEqualTo(1)
diff --git a/misc/tools/readme-examples/src/main/kotlin/readme/examples/MostExamplesSpec.kt b/misc/tools/readme-examples/src/main/kotlin/readme/examples/MostExamplesSpec.kt
index 462e9aaad..663decdb5 100644
--- a/misc/tools/readme-examples/src/main/kotlin/readme/examples/MostExamplesSpec.kt
+++ b/misc/tools/readme-examples/src/main/kotlin/readme/examples/MostExamplesSpec.kt
@@ -219,7 +219,7 @@ class MostExamplesSpec : Spek({
     }
     test("ex-map-5") {
         expect(linkedMapOf("a" to 1, "b" to 2)).asEntries().toContain.inOrder.only.entries(
-            { isKeyValue("a", 1) },
+            { toEqualKeyValue("a", 1) },
             {
                 key.toStartWith("a")
                 value.toBeGreaterThan(2)