diff --git a/CHANGELOG.md b/CHANGELOG.md
index 49a1271a..041d20f9 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,6 +1,7 @@
 
 # CheckStyle-IDEA Changelog
 
+* **5.93.0** New: Files in results are now hidden when all of their children aren't visible in the current filtering state (#644).
 * **5.92.0** New: Added CheckStyle 10.17.0.
 * **5.91.0** New: Added CheckStyle 10.16.0.
 * **5.90.0** New: Added CheckStyle 10.15.0.
diff --git a/build.gradle.kts b/build.gradle.kts
index b7be8691..17fadd5d 100644
--- a/build.gradle.kts
+++ b/build.gradle.kts
@@ -11,7 +11,7 @@ plugins {
     id("org.infernus.idea.checkstyle.build")
 }
 
-version = "5.92.0"
+version = "5.93.0"
 
 repositories {
     mavenCentral()
@@ -48,6 +48,11 @@ java {
 }
 
 tasks {
+    // doesn't work, maybe waiting on https://github.com/JetBrains/intellij-platform-gradle-plugin/issues/1723
+//    prepareSandbox {
+//        sandboxDirectory = intellijPlatform.sandboxContainer.dir("current")
+//    }
+
     withType<VerifyPluginTask> {
         dependsOn(copyClassesToSandbox, copyCheckstyleArtifactsToSandbox)
     }
diff --git a/buildSrc/src/main/java/org/infernus/idea/checkstyle/build/GradlePluginMain.java b/buildSrc/src/main/java/org/infernus/idea/checkstyle/build/GradlePluginMain.java
index 967802da..edcb08e6 100644
--- a/buildSrc/src/main/java/org/infernus/idea/checkstyle/build/GradlePluginMain.java
+++ b/buildSrc/src/main/java/org/infernus/idea/checkstyle/build/GradlePluginMain.java
@@ -192,8 +192,8 @@ private void createCopyClassesToSandboxTask(final Project pProject, final boolea
         });
     }
 
-    // TODO this will break when we change the base IDEA version; it should use SandboxAware or similar: https://plugins.jetbrains.com/docs/intellij/tools-intellij-platform-gradle-plugin-task-awares.html#SandboxAware
     private @NotNull String pluginSandboxDir(final boolean test, final String subDirectory) {
+        // must remain in sync with task configuration in Gradle file
         return "idea-sandbox/IC-2023.1.5/plugins"
                 + (test ? "-test" : "")
                 + "/CheckStyle-IDEA/" + subDirectory;
diff --git a/src/main/java/org/infernus/idea/checkstyle/toolwindow/ResultTreeModel.java b/src/main/java/org/infernus/idea/checkstyle/toolwindow/ResultTreeModel.java
index 9fc430c9..2cdbf91f 100644
--- a/src/main/java/org/infernus/idea/checkstyle/toolwindow/ResultTreeModel.java
+++ b/src/main/java/org/infernus/idea/checkstyle/toolwindow/ResultTreeModel.java
@@ -4,6 +4,7 @@
 import java.util.*;
 import javax.swing.tree.DefaultMutableTreeNode;
 import javax.swing.tree.DefaultTreeModel;
+import javax.swing.tree.MutableTreeNode;
 import javax.swing.tree.TreeNode;
 
 import com.intellij.psi.PsiFile;
@@ -20,12 +21,12 @@ public class ResultTreeModel extends DefaultTreeModel {
     @Serial
     private static final long serialVersionUID = 2161855162879365203L;
 
-    private final DefaultMutableTreeNode visibleRootNode;
+    private final ToggleableTreeNode visibleRootNode;
 
     public ResultTreeModel() {
         super(new DefaultMutableTreeNode());
 
-        visibleRootNode = new DefaultMutableTreeNode();
+        visibleRootNode = new ToggleableTreeNode();
         ((DefaultMutableTreeNode) getRoot()).add(visibleRootNode);
 
         setRootMessage(null);
@@ -83,26 +84,31 @@ public void filter(final SeverityLevel... levels) {
     }
 
     private void filter(final boolean sendEvents, final SeverityLevel... levels) {
-        final Set<ToggleableTreeNode> changedNodes = new HashSet<>();
-
-        for (int fileIndex = 0; fileIndex < visibleRootNode.getChildCount(); ++fileIndex) {
-            final ToggleableTreeNode fileNode = (ToggleableTreeNode) visibleRootNode.getChildAt(fileIndex);
+        final Set<MutableTreeNode> changedNodes = new HashSet<>();
 
+        for (final ToggleableTreeNode fileNode : visibleRootNode.getAllChildren()) {
+            boolean childChanged = false;
             for (final ToggleableTreeNode problemNode : fileNode.getAllChildren()) {
                 final ResultTreeNode result = (ResultTreeNode) problemNode.getUserObject();
 
-                final boolean currentVisible = problemNode.isVisible();
-                final boolean desiredVisible = contains(levels, result.getSeverity());
-                if (currentVisible != desiredVisible) {
-                    problemNode.setVisible(desiredVisible);
-
-                    changedNodes.add(fileNode);
+                final boolean resultShouldBeVisible = contains(levels, result.getSeverity());
+                if (problemNode.isVisible() != resultShouldBeVisible) {
+                    problemNode.setVisible(resultShouldBeVisible);
+                    childChanged = true;
                 }
             }
+
+            final boolean fileNodeShouldBeVisible = fileNode.getChildCount() > 0;
+            if (fileNode.isVisible() != fileNodeShouldBeVisible) {
+                fileNode.setVisible(fileNodeShouldBeVisible);
+                changedNodes.add(visibleRootNode);
+            } else if (childChanged) {
+                changedNodes.add(fileNode);
+            }
         }
 
         if (sendEvents) {
-            for (final ToggleableTreeNode node : changedNodes) {
+            for (final MutableTreeNode node : changedNodes) {
                 nodeStructureChanged(node);
             }
         }
diff --git a/src/main/resources/META-INF/plugin.xml b/src/main/resources/META-INF/plugin.xml
index 5605819f..b3739b0e 100644
--- a/src/main/resources/META-INF/plugin.xml
+++ b/src/main/resources/META-INF/plugin.xml
@@ -18,6 +18,7 @@
     <change-notes>
         <![CDATA[
 <ul>
+    <li>5.93.0: New: Files in results are now hidden when all of their children aren't visible in the current filtering state (#644).</li>
     <li>5.92.0: New: Added CheckStyle 10.17.0.</li>
     <li>5.91.0: New: Added CheckStyle 10.16.0.</li>
     <li>5.90.0: New: Added CheckStyle 10.15.0.</li>