diff --git a/compiler/fir/analysis-tests/testData/resolve/extendedCheckers/RedundantSingleExpressionStringTemplateChecker.fir.txt b/compiler/fir/analysis-tests/testData/resolve/extendedCheckers/RedundantSingleExpressionStringTemplateChecker.fir.txt
index 1d9b40de8d6..2b3711d1315 100644
--- a/compiler/fir/analysis-tests/testData/resolve/extendedCheckers/RedundantSingleExpressionStringTemplateChecker.fir.txt
+++ b/compiler/fir/analysis-tests/testData/resolve/extendedCheckers/RedundantSingleExpressionStringTemplateChecker.fir.txt
@@ -3,6 +3,11 @@ FILE: RedundantSingleExpressionStringTemplateChecker.kt
         public get(): R|kotlin/String|
     public final val y: R|kotlin/String| = <strcat>(R|/x|)
         public get(): R|kotlin/String|
+    public final typealias S = R|kotlin/String|
+    public final val x2: R|S| = String(Hello)
+        public get(): R|S|
+    public final val y2: R|kotlin/String| = <strcat>(R|/x2|)
+        public get(): R|kotlin/String|
     public final val z: R|kotlin/String| = <strcat>(R|/y|.R|kotlin/Any.hashCode|())
         public get(): R|kotlin/String|
     public final fun toString(x: R|kotlin/String|): R|kotlin/String| {
diff --git a/compiler/fir/analysis-tests/testData/resolve/extendedCheckers/RedundantSingleExpressionStringTemplateChecker.kt b/compiler/fir/analysis-tests/testData/resolve/extendedCheckers/RedundantSingleExpressionStringTemplateChecker.kt
index 373bb48ad33..641640fe1db 100644
--- a/compiler/fir/analysis-tests/testData/resolve/extendedCheckers/RedundantSingleExpressionStringTemplateChecker.kt
+++ b/compiler/fir/analysis-tests/testData/resolve/extendedCheckers/RedundantSingleExpressionStringTemplateChecker.kt
@@ -2,6 +2,10 @@ val x = "Hello"
 
 val y = "$<!REDUNDANT_SINGLE_EXPRESSION_STRING_TEMPLATE!>x<!>"
 
+typealias S = String
+val x2: S = "Hello"
+val y2 = "$<!REDUNDANT_SINGLE_EXPRESSION_STRING_TEMPLATE!>x2<!>"
+
 val z = "${y.hashCode()}"
 
 fun toString(x: String) = "IC$x"
diff --git a/compiler/fir/checkers/src/org/jetbrains/kotlin/fir/analysis/checkers/extended/RedundantSingleExpressionStringTemplateChecker.kt b/compiler/fir/checkers/src/org/jetbrains/kotlin/fir/analysis/checkers/extended/RedundantSingleExpressionStringTemplateChecker.kt
index ab899cbfdc8..83f740e3e01 100644
--- a/compiler/fir/checkers/src/org/jetbrains/kotlin/fir/analysis/checkers/extended/RedundantSingleExpressionStringTemplateChecker.kt
+++ b/compiler/fir/checkers/src/org/jetbrains/kotlin/fir/analysis/checkers/extended/RedundantSingleExpressionStringTemplateChecker.kt
@@ -19,7 +19,7 @@ import org.jetbrains.kotlin.fir.analysis.diagnostics.FirErrors.REDUNDANT_SINGLE_
 import org.jetbrains.kotlin.fir.expressions.FirStatement
 import org.jetbrains.kotlin.fir.expressions.FirStringConcatenationCall
 import org.jetbrains.kotlin.fir.expressions.arguments
-import org.jetbrains.kotlin.fir.types.classId
+import org.jetbrains.kotlin.fir.analysis.checkers.fullyExpandedClassId
 import org.jetbrains.kotlin.fir.types.resolvedType
 import org.jetbrains.kotlin.name.StandardClassIds
 import org.jetbrains.kotlin.psi.KtStringTemplateExpression
@@ -28,7 +28,7 @@ import org.jetbrains.kotlin.util.getChildren
 object RedundantSingleExpressionStringTemplateChecker : FirStringConcatenationCallChecker() {
     override fun check(expression: FirStringConcatenationCall, context: CheckerContext, reporter: DiagnosticReporter) {
         for (argumentExpression in expression.arguments) {
-            if (argumentExpression.resolvedType.classId == StandardClassIds.String &&
+            if (argumentExpression.resolvedType.fullyExpandedClassId(context.session) == StandardClassIds.String &&
                 argumentExpression.stringParentChildrenCount() == 1 // there is no more children in original string template
             ) {
                 reporter.reportOn(argumentExpression.source, REDUNDANT_SINGLE_EXPRESSION_STRING_TEMPLATE, context)