diff --git a/repo_test.go b/repo_test.go
index 7501b81..605d13e 100644
--- a/repo_test.go
+++ b/repo_test.go
@@ -222,3 +222,28 @@ accounts:
 		t.Fatalf("config fix commit %q should be verifiable, but got: %v", hash2, err)
 	}
 }
+
+// TestThisRepoStillVerifies opens this actual repository and ensures that all
+// commits in it still verify, given this codebase.
+func TestThisRepoStillVerifies(t *testing.T) {
+	repo, err := OpenRepo(".")
+	if err != nil {
+		t.Fatalf("error opening repo: %v", err)
+	}
+
+	headCommit, _, err := repo.head()
+	if err != nil {
+		t.Fatalf("error getting repo head: %v", err)
+	}
+
+	checkedOutBranch, err := repo.CheckedOutBranch()
+	if err != nil {
+		t.Fatalf("error determining checked out branch: %v", err)
+	}
+
+	for _, hash := range headCommit.ParentHashes {
+		if err := repo.VerifyCommit(checkedOutBranch, hash); err != nil {
+			t.Fatalf("error verifying commit %q of branch %q: %v", hash, checkedOutBranch, err)
+		}
+	}
+}