diff --git a/plugins/gradle/tooling-extension-impl/src/org/jetbrains/plugins/gradle/tooling/builder/ExternalProjectBuilderImpl.groovy b/plugins/gradle/tooling-extension-impl/src/org/jetbrains/plugins/gradle/tooling/builder/ExternalProjectBuilderImpl.groovy
index 23509b902ee8..a501415bdf48 100644
--- a/plugins/gradle/tooling-extension-impl/src/org/jetbrains/plugins/gradle/tooling/builder/ExternalProjectBuilderImpl.groovy
+++ b/plugins/gradle/tooling-extension-impl/src/org/jetbrains/plugins/gradle/tooling/builder/ExternalProjectBuilderImpl.groovy
@@ -136,7 +136,7 @@ class ExternalProjectBuilderImpl implements ModelBuilderService {
     Map<String, Set<File>> artifactsByConfiguration = new HashMap<String, Set<File>>()
     for (Map.Entry<String, Configuration> configurationEntry : configurationsByName.entrySet()) {
       Set<File> files = configurationEntry.getValue().getAllArtifacts().getFiles().getFiles()
-      artifactsByConfiguration.put(configurationEntry.getKey(), files)
+      artifactsByConfiguration.put(configurationEntry.getKey(), new LinkedHashSet<>(files))
     }
     externalProject.setArtifactsByConfiguration(artifactsByConfiguration)
   }
diff --git a/plugins/gradle/tooling-extension-impl/src/org/jetbrains/plugins/gradle/tooling/builder/ModuleExtendedModelBuilderImpl.java b/plugins/gradle/tooling-extension-impl/src/org/jetbrains/plugins/gradle/tooling/builder/ModuleExtendedModelBuilderImpl.java
index 11c2dbfdf1b0..81ff5204ad7c 100644
--- a/plugins/gradle/tooling-extension-impl/src/org/jetbrains/plugins/gradle/tooling/builder/ModuleExtendedModelBuilderImpl.java
+++ b/plugins/gradle/tooling-extension-impl/src/org/jetbrains/plugins/gradle/tooling/builder/ModuleExtendedModelBuilderImpl.java
@@ -219,7 +219,7 @@ public class ModuleExtendedModelBuilderImpl implements ModelBuilderService {
     Map<String, Set<File>> artifactsByConfiguration = new HashMap<String, Set<File>>();
     for (Map.Entry<String, Configuration> configurationEntry : configurationsByName.entrySet()) {
       Set<File> files = configurationEntry.getValue().getAllArtifacts().getFiles().getFiles();
-      artifactsByConfiguration.put(configurationEntry.getKey(), files);
+      artifactsByConfiguration.put(configurationEntry.getKey(), new LinkedHashSet<File>(files));
     }
     moduleVersionModel.setArtifactsByConfiguration(artifactsByConfiguration);
 
diff --git a/plugins/gradle/tooling-extension-impl/src/org/jetbrains/plugins/gradle/tooling/builder/ScalaModelBuilderImpl.groovy b/plugins/gradle/tooling-extension-impl/src/org/jetbrains/plugins/gradle/tooling/builder/ScalaModelBuilderImpl.groovy
index 8ab7e46a5cd7..27e242930e18 100644
--- a/plugins/gradle/tooling-extension-impl/src/org/jetbrains/plugins/gradle/tooling/builder/ScalaModelBuilderImpl.groovy
+++ b/plugins/gradle/tooling-extension-impl/src/org/jetbrains/plugins/gradle/tooling/builder/ScalaModelBuilderImpl.groovy
@@ -69,8 +69,8 @@ class ScalaModelBuilderImpl implements ModelBuilderService {
 
     ScalaCompile scalaCompile = (ScalaCompile)task
     ScalaModelImpl scalaModel = new ScalaModelImpl()
-    scalaModel.scalaClasspath = scalaCompile.scalaClasspath.files
-    scalaModel.zincClasspath = scalaCompile.zincClasspath.files
+    scalaModel.scalaClasspath = new LinkedHashSet<>(scalaCompile.scalaClasspath.files)
+    scalaModel.zincClasspath = new LinkedHashSet<>(scalaCompile.zincClasspath.files)
     scalaModel.scalaCompileOptions = create(scalaCompile.scalaCompileOptions)
     scalaModel.targetCompatibility = scalaCompile.targetCompatibility
     scalaModel.sourceCompatibility = scalaCompile.sourceCompatibility
diff --git a/plugins/gradle/tooling-extension-impl/src/org/jetbrains/plugins/gradle/tooling/builder/WarModelBuilderImpl.groovy b/plugins/gradle/tooling-extension-impl/src/org/jetbrains/plugins/gradle/tooling/builder/WarModelBuilderImpl.groovy
index 85534efefedc..f5256c74befc 100644
--- a/plugins/gradle/tooling-extension-impl/src/org/jetbrains/plugins/gradle/tooling/builder/WarModelBuilderImpl.groovy
+++ b/plugins/gradle/tooling-extension-impl/src/org/jetbrains/plugins/gradle/tooling/builder/WarModelBuilderImpl.groovy
@@ -90,7 +90,7 @@ class WarModelBuilderImpl implements ModelBuilderService {
               }
             }
           })
-          warModel.classpath = warTask.classpath.files
+          warModel.classpath = new LinkedHashSet<>(warTask.classpath.files)
         }
         catch (Exception ignore) {
           ErrorMessageBuilder builderError = getErrorMessageBuilder(project, ignore)