diff --git a/analysis/low-level-api-fir/testdata/getOrBuildFir/declarations/destructuringEntry.outside.txt b/analysis/low-level-api-fir/testdata/getOrBuildFir/declarations/destructuringEntry.out_of_src_roots.txt
similarity index 100%
rename from analysis/low-level-api-fir/testdata/getOrBuildFir/declarations/destructuringEntry.outside.txt
rename to analysis/low-level-api-fir/testdata/getOrBuildFir/declarations/destructuringEntry.out_of_src_roots.txt
diff --git a/analysis/low-level-api-fir/testdata/getOrBuildFir/declarations/propertyDelegate.outside.txt b/analysis/low-level-api-fir/testdata/getOrBuildFir/declarations/propertyDelegate.out_of_src_roots.txt
similarity index 100%
rename from analysis/low-level-api-fir/testdata/getOrBuildFir/declarations/propertyDelegate.outside.txt
rename to analysis/low-level-api-fir/testdata/getOrBuildFir/declarations/propertyDelegate.out_of_src_roots.txt
diff --git a/analysis/low-level-api-fir/testdata/getOrBuildFir/declarations/propertyDelegateExpression.outside.txt b/analysis/low-level-api-fir/testdata/getOrBuildFir/declarations/propertyDelegateExpression.out_of_src_roots.txt
similarity index 100%
rename from analysis/low-level-api-fir/testdata/getOrBuildFir/declarations/propertyDelegateExpression.outside.txt
rename to analysis/low-level-api-fir/testdata/getOrBuildFir/declarations/propertyDelegateExpression.out_of_src_roots.txt
diff --git a/analysis/low-level-api-fir/testdata/getOrBuildFir/expressions/insidePlusAssignTarget.outside.txt b/analysis/low-level-api-fir/testdata/getOrBuildFir/expressions/insidePlusAssignTarget.out_of_src_roots.txt
similarity index 100%
rename from analysis/low-level-api-fir/testdata/getOrBuildFir/expressions/insidePlusAssignTarget.outside.txt
rename to analysis/low-level-api-fir/testdata/getOrBuildFir/expressions/insidePlusAssignTarget.out_of_src_roots.txt
diff --git a/analysis/low-level-api-fir/testdata/getOrBuildFir/expressions/lambdaExpression.outside.txt b/analysis/low-level-api-fir/testdata/getOrBuildFir/expressions/lambdaExpression.out_of_src_roots.txt
similarity index 100%
rename from analysis/low-level-api-fir/testdata/getOrBuildFir/expressions/lambdaExpression.outside.txt
rename to analysis/low-level-api-fir/testdata/getOrBuildFir/expressions/lambdaExpression.out_of_src_roots.txt
diff --git a/analysis/low-level-api-fir/testdata/getOrBuildFir/expressions/throwExpression.outside.txt b/analysis/low-level-api-fir/testdata/getOrBuildFir/expressions/throwExpression.out_of_src_roots.txt
similarity index 100%
rename from analysis/low-level-api-fir/testdata/getOrBuildFir/expressions/throwExpression.outside.txt
rename to analysis/low-level-api-fir/testdata/getOrBuildFir/expressions/throwExpression.out_of_src_roots.txt
diff --git a/analysis/low-level-api-fir/testdata/innerDeclarationsResolve/class.outside.fir.txt b/analysis/low-level-api-fir/testdata/innerDeclarationsResolve/class.out_of_src_roots.fir.txt
similarity index 100%
rename from analysis/low-level-api-fir/testdata/innerDeclarationsResolve/class.outside.fir.txt
rename to analysis/low-level-api-fir/testdata/innerDeclarationsResolve/class.out_of_src_roots.fir.txt
diff --git a/analysis/low-level-api-fir/testdata/innerDeclarationsResolve/functionWithImplicitType.outside.fir.txt b/analysis/low-level-api-fir/testdata/innerDeclarationsResolve/functionWithImplicitType.out_of_src_roots.fir.txt
similarity index 100%
rename from analysis/low-level-api-fir/testdata/innerDeclarationsResolve/functionWithImplicitType.outside.fir.txt
rename to analysis/low-level-api-fir/testdata/innerDeclarationsResolve/functionWithImplicitType.out_of_src_roots.fir.txt
diff --git a/analysis/low-level-api-fir/tests/org/jetbrains/kotlin/analysis/low/level/api/fir/test/configurators/AnalysisApiFirOutOfContentRootTestConfigurator.kt b/analysis/low-level-api-fir/tests/org/jetbrains/kotlin/analysis/low/level/api/fir/test/configurators/AnalysisApiFirOutOfContentRootTestConfigurator.kt
index 0e9f2d237bc..a5c8bfc8afe 100644
--- a/analysis/low-level-api-fir/tests/org/jetbrains/kotlin/analysis/low/level/api/fir/test/configurators/AnalysisApiFirOutOfContentRootTestConfigurator.kt
+++ b/analysis/low-level-api-fir/tests/org/jetbrains/kotlin/analysis/low/level/api/fir/test/configurators/AnalysisApiFirOutOfContentRootTestConfigurator.kt
@@ -28,7 +28,7 @@ import org.jetbrains.kotlin.test.services.TestServices
 
 object AnalysisApiFirOutOfContentRootTestConfigurator : AnalysisApiFirSourceLikeTestConfigurator(false) {
     override val testPrefix: String
-        get() = "outside"
+        get() = "out_of_src_roots"
 
     override fun configureTest(builder: TestConfigurationBuilder, disposable: Disposable) {
         super.configureTest(builder, disposable)