diff --git a/save-common/src/commonMain/kotlin/org/cqfn/save/core/plugin/Plugin.kt b/save-common/src/commonMain/kotlin/org/cqfn/save/core/plugin/Plugin.kt
index 3e202b6a9..4e788e0f8 100644
--- a/save-common/src/commonMain/kotlin/org/cqfn/save/core/plugin/Plugin.kt
+++ b/save-common/src/commonMain/kotlin/org/cqfn/save/core/plugin/Plugin.kt
@@ -20,7 +20,7 @@ import okio.Path
  * @property redirectTo a file where process output and errors should be redirected. If null, output will be returned as [ExecutionResult.stdout] and [ExecutionResult.stderr].
  */
 abstract class Plugin(
-    open val testConfig: TestConfig,
+    val testConfig: TestConfig,
     protected val testFiles: List<String>,
     protected val fs: FileSystem,
     private val useInternalRedirections: Boolean,
@@ -29,6 +29,9 @@ abstract class Plugin(
      * Instance that is capable of executing processes
      */
     val pb = ProcessBuilder(useInternalRedirections, fs)
+    init {
+        testConfig.validateAndSetDefaults()
+    }
 
     /**
      * Perform plugin's work.
diff --git a/save-plugins/fix-and-warn-plugin/src/commonMain/kotlin/org/cqfn/save/plugins/fixandwarn/FixAndWarnPlugin.kt b/save-plugins/fix-and-warn-plugin/src/commonMain/kotlin/org/cqfn/save/plugins/fixandwarn/FixAndWarnPlugin.kt
index 44143b341..77a52f9e7 100644
--- a/save-plugins/fix-and-warn-plugin/src/commonMain/kotlin/org/cqfn/save/plugins/fixandwarn/FixAndWarnPlugin.kt
+++ b/save-plugins/fix-and-warn-plugin/src/commonMain/kotlin/org/cqfn/save/plugins/fixandwarn/FixAndWarnPlugin.kt
@@ -65,7 +65,6 @@ class FixAndWarnPlugin(
     )
 
     override fun handleFiles(files: Sequence<List<Path>>): Sequence<TestResult> {
-        testConfig.validateAndSetDefaults()
         // Need to update private fields after validation
         initOrUpdateConfigs()
         val testFilePattern = warnPluginConfig.resourceNamePattern
diff --git a/save-plugins/fix-and-warn-plugin/src/commonMain/kotlin/org/cqfn/save/plugins/fixandwarn/FixAndWarnPluginConfig.kt b/save-plugins/fix-and-warn-plugin/src/commonMain/kotlin/org/cqfn/save/plugins/fixandwarn/FixAndWarnPluginConfig.kt
index 406696d9e..1efd290f7 100644
--- a/save-plugins/fix-and-warn-plugin/src/commonMain/kotlin/org/cqfn/save/plugins/fixandwarn/FixAndWarnPluginConfig.kt
+++ b/save-plugins/fix-and-warn-plugin/src/commonMain/kotlin/org/cqfn/save/plugins/fixandwarn/FixAndWarnPluginConfig.kt
@@ -36,16 +36,19 @@ data class FixAndWarnPluginConfig(
     }
 
     override fun validateAndSetDefaults(): PluginConfig {
-        require(fix.resourceNameTest == warn.testName && fix.batchSize == warn.batchSize) {
+        val fixPluginConfig = fix.validateAndSetDefaults()
+        val warnPluginConfig = warn.validateAndSetDefaults()
+        require(fixPluginConfig.resourceNameTest == warnPluginConfig.testNameSuffix &&
+                fixPluginConfig.batchSize == warnPluginConfig.batchSize
+        ) {
             """
                Test files suffix names and batch sizes should be identical for [fix] and [warn] plugins.
-               But found [fix]: {${fix.resourceNameTest}, ${fix.batchSize}},
-                         [warn]: {${warn.testName}, ${warn.batchSize}}
+               But found [fix]: {${fixPluginConfig.resourceNameTest}, ${fixPluginConfig.batchSize}},
+                         [warn]: {${warnPluginConfig.testNameSuffix}, ${warnPluginConfig.batchSize}}
            """
         }
         return FixAndWarnPluginConfig(
-            fix.validateAndSetDefaults(),
-            warn.validateAndSetDefaults()
+            fixPluginConfig, warnPluginConfig
         )
     }
 }
diff --git a/save-plugins/fix-plugin/src/commonMain/kotlin/org/cqfn/save/plugins/fix/FixPlugin.kt b/save-plugins/fix-plugin/src/commonMain/kotlin/org/cqfn/save/plugins/fix/FixPlugin.kt
index 4e1982bc6..079913509 100644
--- a/save-plugins/fix-plugin/src/commonMain/kotlin/org/cqfn/save/plugins/fix/FixPlugin.kt
+++ b/save-plugins/fix-plugin/src/commonMain/kotlin/org/cqfn/save/plugins/fix/FixPlugin.kt
@@ -47,8 +47,6 @@ class FixPlugin(
 
     @Suppress("TOO_LONG_FUNCTION")
     override fun handleFiles(files: Sequence<List<Path>>): Sequence<TestResult> {
-        testConfig.validateAndSetDefaults()
-
         val fixPluginConfig = testConfig.pluginConfigs.filterIsInstance<FixPluginConfig>().single()
         val generalConfig = testConfig.pluginConfigs.filterIsInstance<GeneralConfig>().single()
 
diff --git a/save-plugins/warn-plugin/src/commonMain/kotlin/org/cqfn/save/plugin/warn/WarnPlugin.kt b/save-plugins/warn-plugin/src/commonMain/kotlin/org/cqfn/save/plugin/warn/WarnPlugin.kt
index 9d686323e..b92f960f1 100644
--- a/save-plugins/warn-plugin/src/commonMain/kotlin/org/cqfn/save/plugin/warn/WarnPlugin.kt
+++ b/save-plugins/warn-plugin/src/commonMain/kotlin/org/cqfn/save/plugin/warn/WarnPlugin.kt
@@ -41,8 +41,6 @@ class WarnPlugin(
     private val unexpected = "Some warnings were unexpected"
 
     override fun handleFiles(files: Sequence<List<Path>>): Sequence<TestResult> {
-        testConfig.validateAndSetDefaults()
-
         val warnPluginConfig = testConfig.pluginConfigs.filterIsInstance<WarnPluginConfig>().single()
         val generalConfig = testConfig.pluginConfigs.filterIsInstance<GeneralConfig>().single()
 
diff --git a/save-plugins/warn-plugin/src/commonMain/kotlin/org/cqfn/save/plugin/warn/WarnPluginConfig.kt b/save-plugins/warn-plugin/src/commonMain/kotlin/org/cqfn/save/plugin/warn/WarnPluginConfig.kt
index 1fdd34b23..583e8c349 100644
--- a/save-plugins/warn-plugin/src/commonMain/kotlin/org/cqfn/save/plugin/warn/WarnPluginConfig.kt
+++ b/save-plugins/warn-plugin/src/commonMain/kotlin/org/cqfn/save/plugin/warn/WarnPluginConfig.kt
@@ -42,7 +42,7 @@ import kotlinx.serialization.UseSerializers
  * @property batchSize it controls how many files execCmd will process at a time.
  * @property batchSeparator separator for batch mode
  * @property linePlaceholder placeholder for line number, which resolved as current line and support addition and subtraction
- * @property wildCardInDirectoryMode mode that controls that we are targetting our tested tools on directories (not on files).
+ * @property wildCardInDirectoryMode mode that controls that we are targeting our tested tools on directories (not on files).
  * This prefix will be added to the name of the directory, if you would like to use directory mode without any prefix simply use ""
  */
 @Serializable
@@ -71,17 +71,12 @@ data class WarnPluginConfig(
     override var configLocation: Path = "undefined_toml_location".toPath()
 
     /**
-     * @property suffix name of the test file.
+     * regex for the name of the test files.
      */
-    val testName: String = testNameSuffix ?: "Test"
-
-    /**
-     *  @property resourceNamePattern regex for the name of the test files.
-     */
-    val resourceNamePattern: Regex = if (testName == "Test") {
-        Regex("""(.+)${(testName)}\.[\w\d]+""")
+    val resourceNamePattern: Regex = if (testNameSuffix == "Test") {
+        Regex("""(.+)${(testNameSuffix)}\.[\w\d]+""")
     } else {
-        Regex("""(.+)${(testName)}""")
+        Regex("""(.+)${(testNameSuffix)}""")
     }
 
     @Suppress("ComplexMethod")
@@ -147,7 +142,7 @@ data class WarnPluginConfig(
             newColumnCaptureGroupOut,
             newMessageCaptureGroupOut,
             exactWarningsMatch ?: true,
-            testName,
+            testNameSuffix ?: "Test",
             linePlaceholder ?: "\$line",
             wildCardInDirectoryMode,
         )