diff --git a/dist/index.js b/dist/index.js
index a251a19..a46f6db 100644
--- a/dist/index.js
+++ b/dist/index.js
@@ -754,7 +754,9 @@ class GitCommandManager {
     disableSparseCheckout() {
         return __awaiter(this, void 0, void 0, function* () {
             yield this.execGit(['sparse-checkout', 'disable']);
-            // Disabling 'sparse-checkout` leaves behind an undesirable side-effect in config (even in a pristine environment).
+            // Ensures that a previously enabled 'sparse-checkout' (e.g. via sparseCheckoutNonConeMode) is also disabled in the config.
+            yield this.execGit(['config', 'core.sparseCheckout', 'false']);
+            // Disabling 'sparse-checkout' leaves behind an undesirable side-effect in config (even in a pristine environment).
             yield this.tryConfigUnset('extensions.worktreeConfig', false);
         });
     }
diff --git a/src/git-command-manager.ts b/src/git-command-manager.ts
index a45e15a..c4ba192 100644
--- a/src/git-command-manager.ts
+++ b/src/git-command-manager.ts
@@ -196,7 +196,9 @@ class GitCommandManager {
 
   async disableSparseCheckout(): Promise<void> {
     await this.execGit(['sparse-checkout', 'disable'])
-    // Disabling 'sparse-checkout` leaves behind an undesirable side-effect in config (even in a pristine environment).
+    // Ensures that a previously enabled 'sparse-checkout' (e.g. via sparseCheckoutNonConeMode) is also disabled in the config.
+    await this.execGit(['config', 'core.sparseCheckout', 'false'])
+    // Disabling 'sparse-checkout' leaves behind an undesirable side-effect in config (even in a pristine environment).
     await this.tryConfigUnset('extensions.worktreeConfig', false)
   }