diff --git a/scripts/export-miner-prometheus-textfile.sh b/scripts/export-miner-prometheus-textfile.sh
index e0c6606690..bff7528624 100644
--- a/scripts/export-miner-prometheus-textfile.sh
+++ b/scripts/export-miner-prometheus-textfile.sh
@@ -19,7 +19,7 @@ set -eu
 # aborting the whole export -- Prometheus treats an absent series as "no data", not an error, so a partial
 # export is strictly better than a stale-forever or entirely-missing one.
 
-MINER_BIN="${LOOPOVER_MINER_BIN:-gittensory-miner}"
+MINER_BIN="${LOOPOVER_MINER_BIN:-loopover-miner}"
 OUT_FILE="${LOOPOVER_MINER_PROMETHEUS_TEXTFILE:-/var/lib/node_exporter/textfile_collector/gittensory_miner.prom}"
 TMP_FILE="${OUT_FILE}.tmp"
 
diff --git a/test/unit/export-miner-prometheus-textfile-script.test.ts b/test/unit/export-miner-prometheus-textfile-script.test.ts
new file mode 100644
index 0000000000..60565809ac
--- /dev/null
+++ b/test/unit/export-miner-prometheus-textfile-script.test.ts
@@ -0,0 +1,101 @@
+import { execFileSync } from "node:child_process";
+import { chmodSync, mkdtempSync, readFileSync, rmSync, writeFileSync } from "node:fs";
+import { tmpdir } from "node:os";
+import { join } from "node:path";
+import { afterEach, describe, expect, it } from "vitest";
+
+// export-miner-prometheus-textfile.sh (#4839): regression for #5934, where the script's default MINER_BIN
+// fallback pointed at `gittensory-miner`, a binary the package never installs (its real `bin` entry is
+// `loopover-miner`). With no LOOPOVER_MINER_BIN override -- the script's own documented zero-config usage --
+// every `export_family` call hit "command not found" and, being fail-open per family, silently produced an
+// empty .prom file instead of erroring loudly.
+
+const tmpRoots: string[] = [];
+
+function tmpRoot(): string {
+  const dir = mkdtempSync(join(tmpdir(), "miner-prometheus-textfile-"));
+  tmpRoots.push(dir);
+  return dir;
+}
+
+afterEach(() => {
+  for (const dir of tmpRoots.splice(0)) rmSync(dir, { force: true, recursive: true });
+});
+
+/** A fake `loopover-miner` that answers each of the script's four subcommands with distinguishable text, so
+ *  tests can assert the export actually reached it (as opposed to falling back to a nonexistent binary). */
+function fakeMinerBin(root: string, name = "loopover-miner"): string {
+  const bin = join(root, "bin");
+  execFileSync("mkdir", ["-p", bin]);
+  const path = join(bin, name);
+  writeFileSync(
+    path,
+    `#!/bin/sh
+case "$1 $2" in
+  "metrics ") echo "fake_prediction_calibration 1" ;;
+  "queue metrics") echo "fake_portfolio_queue 1" ;;
+  "ledger metrics") echo "fake_event_ledger 1" ;;
+  "governor metrics") echo "fake_governor 1" ;;
+  *) echo "unexpected args: $*" >&2; exit 2 ;;
+esac
+`,
+  );
+  chmodSync(path, 0o755);
+  return bin;
+}
+
+function runExport(outFile: string, env: Record<string, string> = {}): { stdout: string; stderr: string } {
+  try {
+    const stdout = execFileSync("sh", ["scripts/export-miner-prometheus-textfile.sh"], {
+      cwd: process.cwd(),
+      encoding: "utf8",
+      env: {
+        ...process.env,
+        LOOPOVER_MINER_PROMETHEUS_TEXTFILE: outFile,
+        ...env,
+      },
+      stdio: ["ignore", "pipe", "pipe"],
+    });
+    return { stdout, stderr: "" };
+  } catch (error) {
+    const err = error as { stdout?: Buffer; stderr?: Buffer };
+    return { stdout: err.stdout?.toString() ?? "", stderr: err.stderr?.toString() ?? "" };
+  }
+}
+
+describe("export-miner-prometheus-textfile.sh (#5934)", () => {
+  it("defaults MINER_BIN to loopover-miner, not the nonexistent gittensory-miner", () => {
+    const script = readFileSync(join(process.cwd(), "scripts/export-miner-prometheus-textfile.sh"), "utf8");
+    expect(script).toMatch(/MINER_BIN="\$\{LOOPOVER_MINER_BIN:-loopover-miner\}"/);
+  });
+
+  it("REGRESSION: with no LOOPOVER_MINER_BIN override, invokes the real loopover-miner binary and populates every family", () => {
+    const root = tmpRoot();
+    const bin = fakeMinerBin(root);
+    const outFile = join(root, "out", "miner.prom");
+
+    const result = runExport(outFile, { PATH: `${bin}:${process.env.PATH ?? ""}` });
+
+    expect(result.stderr).not.toMatch(/export failed/);
+    const content = readFileSync(outFile, "utf8");
+    expect(content).toContain("fake_prediction_calibration 1");
+    expect(content).toContain("fake_portfolio_queue 1");
+    expect(content).toContain("fake_event_ledger 1");
+    expect(content).toContain("fake_governor 1");
+  });
+
+  it("still honors an explicit LOOPOVER_MINER_BIN override", () => {
+    const root = tmpRoot();
+    const bin = fakeMinerBin(root, "custom-miner-bin");
+    const outFile = join(root, "out", "miner.prom");
+
+    const result = runExport(outFile, {
+      PATH: process.env.PATH ?? "",
+      LOOPOVER_MINER_BIN: join(bin, "custom-miner-bin"),
+    });
+
+    expect(result.stderr).not.toMatch(/export failed/);
+    const content = readFileSync(outFile, "utf8");
+    expect(content).toContain("fake_prediction_calibration 1");
+  });
+});