diff --git a/analysis/low-level-api-fir/tests/org/jetbrains/kotlin/analysis/low/level/api/fir/diagnostic/compiler/based/DiagnosticCompilerTestFirTestdataTestGenerated.java b/analysis/low-level-api-fir/tests/org/jetbrains/kotlin/analysis/low/level/api/fir/diagnostic/compiler/based/DiagnosticCompilerTestFirTestdataTestGenerated.java
index 42f6e818205..4e855d8a8ca 100644
--- a/analysis/low-level-api-fir/tests/org/jetbrains/kotlin/analysis/low/level/api/fir/diagnostic/compiler/based/DiagnosticCompilerTestFirTestdataTestGenerated.java
+++ b/analysis/low-level-api-fir/tests/org/jetbrains/kotlin/analysis/low/level/api/fir/diagnostic/compiler/based/DiagnosticCompilerTestFirTestdataTestGenerated.java
@@ -3152,6 +3152,24 @@ public class DiagnosticCompilerTestFirTestdataTestGenerated extends AbstractDiag
                     runTest("compiler/fir/analysis-tests/testData/resolve/extendedCheckers/unused/invoke.kt");
                 }
 
+                @Test
+                @TestMetadata("invokeKFunction.kt")
+                public void testInvokeKFunction() throws Exception {
+                    runTest("compiler/fir/analysis-tests/testData/resolve/extendedCheckers/unused/invokeKFunction.kt");
+                }
+
+                @Test
+                @TestMetadata("invokeKFunctionFromMethodReference.kt")
+                public void testInvokeKFunctionFromMethodReference() throws Exception {
+                    runTest("compiler/fir/analysis-tests/testData/resolve/extendedCheckers/unused/invokeKFunctionFromMethodReference.kt");
+                }
+
+                @Test
+                @TestMetadata("invokeKSuspendFunction.kt")
+                public void testInvokeKSuspendFunction() throws Exception {
+                    runTest("compiler/fir/analysis-tests/testData/resolve/extendedCheckers/unused/invokeKSuspendFunction.kt");
+                }
+
                 @Test
                 @TestMetadata("lambda.kt")
                 public void testLambda() throws Exception {
diff --git a/analysis/low-level-api-fir/tests/org/jetbrains/kotlin/analysis/low/level/api/fir/diagnostic/compiler/based/LLFirPreresolvedReversedDiagnosticCompilerFirTestDataTestGenerated.java b/analysis/low-level-api-fir/tests/org/jetbrains/kotlin/analysis/low/level/api/fir/diagnostic/compiler/based/LLFirPreresolvedReversedDiagnosticCompilerFirTestDataTestGenerated.java
index c8ce5f8c472..0563bfa62e7 100644
--- a/analysis/low-level-api-fir/tests/org/jetbrains/kotlin/analysis/low/level/api/fir/diagnostic/compiler/based/LLFirPreresolvedReversedDiagnosticCompilerFirTestDataTestGenerated.java
+++ b/analysis/low-level-api-fir/tests/org/jetbrains/kotlin/analysis/low/level/api/fir/diagnostic/compiler/based/LLFirPreresolvedReversedDiagnosticCompilerFirTestDataTestGenerated.java
@@ -3152,6 +3152,24 @@ public class LLFirPreresolvedReversedDiagnosticCompilerFirTestDataTestGenerated
                     runTest("compiler/fir/analysis-tests/testData/resolve/extendedCheckers/unused/invoke.kt");
                 }
 
+                @Test
+                @TestMetadata("invokeKFunction.kt")
+                public void testInvokeKFunction() throws Exception {
+                    runTest("compiler/fir/analysis-tests/testData/resolve/extendedCheckers/unused/invokeKFunction.kt");
+                }
+
+                @Test
+                @TestMetadata("invokeKFunctionFromMethodReference.kt")
+                public void testInvokeKFunctionFromMethodReference() throws Exception {
+                    runTest("compiler/fir/analysis-tests/testData/resolve/extendedCheckers/unused/invokeKFunctionFromMethodReference.kt");
+                }
+
+                @Test
+                @TestMetadata("invokeKSuspendFunction.kt")
+                public void testInvokeKSuspendFunction() throws Exception {
+                    runTest("compiler/fir/analysis-tests/testData/resolve/extendedCheckers/unused/invokeKSuspendFunction.kt");
+                }
+
                 @Test
                 @TestMetadata("lambda.kt")
                 public void testLambda() throws Exception {
diff --git a/compiler/fir/analysis-tests/testData/resolve/extendedCheckers/unused/invokeKFunction.fir.txt b/compiler/fir/analysis-tests/testData/resolve/extendedCheckers/unused/invokeKFunction.fir.txt
new file mode 100644
index 00000000000..1b6cb4a0bcd
--- /dev/null
+++ b/compiler/fir/analysis-tests/testData/resolve/extendedCheckers/unused/invokeKFunction.fir.txt
@@ -0,0 +1,5 @@
+FILE: invokeKFunction.kt
+    public final fun foo(action: R|kotlin/reflect/KFunction1<kotlin/String, kotlin/Int>|): R|kotlin/Int| {
+        lval localAction: R|kotlin/reflect/KFunction1<kotlin/String, kotlin/Int>| = R|<local>/action|
+        ^foo R|<local>/localAction|.R|SubstitutionOverride<kotlin/reflect/KFunction1.invoke: R|kotlin/Int|>|(String(hello))
+    }
diff --git a/compiler/fir/analysis-tests/testData/resolve/extendedCheckers/unused/invokeKFunction.kt b/compiler/fir/analysis-tests/testData/resolve/extendedCheckers/unused/invokeKFunction.kt
new file mode 100644
index 00000000000..c3c6467b022
--- /dev/null
+++ b/compiler/fir/analysis-tests/testData/resolve/extendedCheckers/unused/invokeKFunction.kt
@@ -0,0 +1,8 @@
+// WITH_STDLIB
+import kotlin.reflect.KFunction1
+
+fun foo(action: KFunction1<String, Int>): Int {
+    val <!UNUSED_VARIABLE!>localAction<!> = action
+
+    return localAction("hello")
+}
\ No newline at end of file
diff --git a/compiler/fir/analysis-tests/testData/resolve/extendedCheckers/unused/invokeKFunctionFromMethodReference.fir.txt b/compiler/fir/analysis-tests/testData/resolve/extendedCheckers/unused/invokeKFunctionFromMethodReference.fir.txt
new file mode 100644
index 00000000000..15438ea1d2f
--- /dev/null
+++ b/compiler/fir/analysis-tests/testData/resolve/extendedCheckers/unused/invokeKFunctionFromMethodReference.fir.txt
@@ -0,0 +1,9 @@
+FILE: invokeKFunctionFromMethodReference.kt
+    public final fun foo(): R|kotlin/Int| {
+        local final fun action(s: R|kotlin/String|): R|kotlin/Int| {
+            ^action R|<local>/s|.R|kotlin/text/toInt|()
+        }
+
+        lval localAction: R|kotlin/reflect/KFunction1<kotlin/String, kotlin/Int>| = ::R|<local>/action|
+        ^foo R|<local>/localAction|.R|SubstitutionOverride<kotlin/reflect/KFunction1.invoke: R|kotlin/Int|>|(String(hello))
+    }
diff --git a/compiler/fir/analysis-tests/testData/resolve/extendedCheckers/unused/invokeKFunctionFromMethodReference.kt b/compiler/fir/analysis-tests/testData/resolve/extendedCheckers/unused/invokeKFunctionFromMethodReference.kt
new file mode 100644
index 00000000000..f2ea470d5f6
--- /dev/null
+++ b/compiler/fir/analysis-tests/testData/resolve/extendedCheckers/unused/invokeKFunctionFromMethodReference.kt
@@ -0,0 +1,8 @@
+// WITH_STDLIB
+fun foo(): Int {
+    fun action(s: String): Int = s.toInt()
+
+    val <!UNUSED_VARIABLE!>localAction<!> = ::action
+
+    return localAction("hello")
+}
\ No newline at end of file
diff --git a/compiler/fir/analysis-tests/testData/resolve/extendedCheckers/unused/invokeKSuspendFunction.fir.txt b/compiler/fir/analysis-tests/testData/resolve/extendedCheckers/unused/invokeKSuspendFunction.fir.txt
new file mode 100644
index 00000000000..5ab14bbd41f
--- /dev/null
+++ b/compiler/fir/analysis-tests/testData/resolve/extendedCheckers/unused/invokeKSuspendFunction.fir.txt
@@ -0,0 +1,5 @@
+FILE: invokeKSuspendFunction.kt
+    public final suspend fun foo(action: R|kotlin/reflect/KSuspendFunction1<kotlin/String, kotlin/Int>|): R|kotlin/Int| {
+        lval localAction: R|kotlin/reflect/KSuspendFunction1<kotlin/String, kotlin/Int>| = R|<local>/action|
+        ^foo R|<local>/localAction|.R|SubstitutionOverride<kotlin/reflect/KSuspendFunction1.invoke: R|kotlin/Int|>|(String(hello))
+    }
diff --git a/compiler/fir/analysis-tests/testData/resolve/extendedCheckers/unused/invokeKSuspendFunction.kt b/compiler/fir/analysis-tests/testData/resolve/extendedCheckers/unused/invokeKSuspendFunction.kt
new file mode 100644
index 00000000000..76403dd73cb
--- /dev/null
+++ b/compiler/fir/analysis-tests/testData/resolve/extendedCheckers/unused/invokeKSuspendFunction.kt
@@ -0,0 +1,8 @@
+// WITH_STDLIB
+import kotlin.reflect.KSuspendFunction1
+
+suspend fun foo(action: KSuspendFunction1<String, Int>): Int {
+    val <!UNUSED_VARIABLE!>localAction<!> = action
+
+    return localAction("hello")
+}
\ No newline at end of file
diff --git a/compiler/fir/analysis-tests/tests-gen/org/jetbrains/kotlin/test/runners/FirLightTreeDiagnosticsTestGenerated.java b/compiler/fir/analysis-tests/tests-gen/org/jetbrains/kotlin/test/runners/FirLightTreeDiagnosticsTestGenerated.java
index 635e7f58b40..dd5b7a22222 100644
--- a/compiler/fir/analysis-tests/tests-gen/org/jetbrains/kotlin/test/runners/FirLightTreeDiagnosticsTestGenerated.java
+++ b/compiler/fir/analysis-tests/tests-gen/org/jetbrains/kotlin/test/runners/FirLightTreeDiagnosticsTestGenerated.java
@@ -3152,6 +3152,24 @@ public class FirLightTreeDiagnosticsTestGenerated extends AbstractFirLightTreeDi
                     runTest("compiler/fir/analysis-tests/testData/resolve/extendedCheckers/unused/invoke.kt");
                 }
 
+                @Test
+                @TestMetadata("invokeKFunction.kt")
+                public void testInvokeKFunction() throws Exception {
+                    runTest("compiler/fir/analysis-tests/testData/resolve/extendedCheckers/unused/invokeKFunction.kt");
+                }
+
+                @Test
+                @TestMetadata("invokeKFunctionFromMethodReference.kt")
+                public void testInvokeKFunctionFromMethodReference() throws Exception {
+                    runTest("compiler/fir/analysis-tests/testData/resolve/extendedCheckers/unused/invokeKFunctionFromMethodReference.kt");
+                }
+
+                @Test
+                @TestMetadata("invokeKSuspendFunction.kt")
+                public void testInvokeKSuspendFunction() throws Exception {
+                    runTest("compiler/fir/analysis-tests/testData/resolve/extendedCheckers/unused/invokeKSuspendFunction.kt");
+                }
+
                 @Test
                 @TestMetadata("lambda.kt")
                 public void testLambda() throws Exception {
diff --git a/compiler/fir/analysis-tests/tests-gen/org/jetbrains/kotlin/test/runners/FirPsiDiagnosticTestGenerated.java b/compiler/fir/analysis-tests/tests-gen/org/jetbrains/kotlin/test/runners/FirPsiDiagnosticTestGenerated.java
index fae370ea502..7bfa74063f7 100644
--- a/compiler/fir/analysis-tests/tests-gen/org/jetbrains/kotlin/test/runners/FirPsiDiagnosticTestGenerated.java
+++ b/compiler/fir/analysis-tests/tests-gen/org/jetbrains/kotlin/test/runners/FirPsiDiagnosticTestGenerated.java
@@ -3152,6 +3152,24 @@ public class FirPsiDiagnosticTestGenerated extends AbstractFirPsiDiagnosticTest
                     runTest("compiler/fir/analysis-tests/testData/resolve/extendedCheckers/unused/invoke.kt");
                 }
 
+                @Test
+                @TestMetadata("invokeKFunction.kt")
+                public void testInvokeKFunction() throws Exception {
+                    runTest("compiler/fir/analysis-tests/testData/resolve/extendedCheckers/unused/invokeKFunction.kt");
+                }
+
+                @Test
+                @TestMetadata("invokeKFunctionFromMethodReference.kt")
+                public void testInvokeKFunctionFromMethodReference() throws Exception {
+                    runTest("compiler/fir/analysis-tests/testData/resolve/extendedCheckers/unused/invokeKFunctionFromMethodReference.kt");
+                }
+
+                @Test
+                @TestMetadata("invokeKSuspendFunction.kt")
+                public void testInvokeKSuspendFunction() throws Exception {
+                    runTest("compiler/fir/analysis-tests/testData/resolve/extendedCheckers/unused/invokeKSuspendFunction.kt");
+                }
+
                 @Test
                 @TestMetadata("lambda.kt")
                 public void testLambda() throws Exception {