diff --git a/libraries/tools/kotlin-gradle-plugin/src/functionalTest/kotlin/org/jetbrains/kotlin/gradle/unitTests/diagnosticsTests/KotlinSourceSetTreeDependsOnMismatchTest.kt b/libraries/tools/kotlin-gradle-plugin/src/functionalTest/kotlin/org/jetbrains/kotlin/gradle/unitTests/diagnosticsTests/KotlinSourceSetTreeDependsOnMismatchTest.kt
index e1768b4262a..788b548e994 100644
--- a/libraries/tools/kotlin-gradle-plugin/src/functionalTest/kotlin/org/jetbrains/kotlin/gradle/unitTests/diagnosticsTests/KotlinSourceSetTreeDependsOnMismatchTest.kt
+++ b/libraries/tools/kotlin-gradle-plugin/src/functionalTest/kotlin/org/jetbrains/kotlin/gradle/unitTests/diagnosticsTests/KotlinSourceSetTreeDependsOnMismatchTest.kt
@@ -137,6 +137,14 @@ class KotlinSourceSetTreeDependsOnMismatchTest {
         ),
     )
 
+    @Test
+    fun `test long diamond source set dependencies`() = checkDiagnostics {
+        sourceSets.getByName("iosMain").dependsOn(sourceSets.getByName("iosTest"))
+        sourceSets.getByName("appleTest").dependsOn(sourceSets.getByName("appleMain"))
+    }.assertDiagnostics(
+        KotlinSourceSetTreeDependsOnMismatch(dependeeName = "iosMain", dependencyName = "iosTest")
+    )
+
     @Test
     fun `test that only lowest source set edges are reported`() = checkDiagnostics {
         sourceSets.getByName("iosX64Test").dependsOn(sourceSets.getByName("iosMain"))