diff --git a/.changeset/read-only-workspace-dirty.md b/.changeset/read-only-workspace-dirty.md
new file mode 100644
index 00000000..9a925859
--- /dev/null
+++ b/.changeset/read-only-workspace-dirty.md
@@ -0,0 +1,5 @@
+---
+"@matdata/yasgui": patch
+---
+
+Queries opened from a read-only workspace are no longer marked as unsaved after edits, and closing their tab no longer asks to save.
diff --git a/docs/user-guide.md b/docs/user-guide.md
index a00d6a1e..3cbeab28 100644
--- a/docs/user-guide.md
+++ b/docs/user-guide.md
@@ -1034,6 +1034,7 @@ This feature is designed for **power users** who want to:
 - the workspace is never offered as a save target, and is marked "(read-only)" in the Query Browser
 - saving a query opened from it (`Ctrl+S`, the save button or the tab menu) opens **Save as**, so the changes can only be stored as a copy in another workspace
 - rename, move and delete are not available in the Query Browser, and renaming the tab only changes the tab label
+- editing a query opened from it does not mark the tab as unsaved, and closing the tab does not ask to save
 
 When every configured workspace is read-only, the save button is hidden.
 
diff --git a/packages/yasgui/src/Tab.ts b/packages/yasgui/src/Tab.ts
index acd8b0be..c7924ea4 100644
--- a/packages/yasgui/src/Tab.ts
+++ b/packages/yasgui/src/Tab.ts
@@ -133,6 +133,8 @@ export class Tab extends EventEmitter {
     const meta = this.getManagedQueryMetadata();
     if (!meta) return false;
     if (!meta.lastSavedTextHash) return false;
+    // Edits to a query from a read-only workspace can never be saved back, so they are not "unsaved changes".
+    if (isWorkspaceReadOnly(this.yasgui.persistentConfig.getWorkspace(meta.workspaceId))) return false;
 
     try {
       const current = this.yasqe ? this.yasqe.getValue() : this.persistentJson.yasqe.value;