diff --git a/src/app/api/import/csv/__tests__/route.test.ts b/src/app/api/import/csv/__tests__/route.test.ts
index 70e47ed3e..2ae1143a7 100644
--- a/src/app/api/import/csv/__tests__/route.test.ts
+++ b/src/app/api/import/csv/__tests__/route.test.ts
@@ -59,6 +59,7 @@ vi.mock("@/lib/rollups/measurement-rollups", async () => {
 
 import { NextRequest } from "next/server";
 import { POST } from "../route";
+import { MGDL_PER_MMOL } from "@/lib/glucose";
 import { checkRateLimit } from "@/lib/rate-limit";
 import { prisma } from "@/lib/db";
 import { recomputeBucketsForMeasurement } from "@/lib/rollups/measurement-rollups";
@@ -369,7 +370,7 @@ describe("POST /api/import/csv — contextless blood glucose", () => {
       externalId: "sensor-1",
       glucoseContext: null,
     });
-    expect(row.value).toBeCloseTo(95.4848, 3);
+    expect(row.value).toBeCloseTo(5.3 * MGDL_PER_MMOL, 3);
     expect((row.measuredAt as Date).toISOString()).toBe(
       "2024-04-03T02:15:00.000Z",
     );
diff --git a/src/lib/import/__tests__/csv-measurements.test.ts b/src/lib/import/__tests__/csv-measurements.test.ts
index ab57ccc0b..77ec61908 100644
--- a/src/lib/import/__tests__/csv-measurements.test.ts
+++ b/src/lib/import/__tests__/csv-measurements.test.ts
@@ -1,4 +1,5 @@
 import { describe, it, expect } from "vitest";
+import { MGDL_PER_MMOL, mgdlToMmol } from "@/lib/glucose";
 
 import {
   parseCsvMeasurements,
@@ -98,7 +99,12 @@ describe("parseCsvMeasurements — unit conversion", () => {
     ]);
     expect(out.rows[0].status).toBe("ok");
     expect(out.rows[0].row?.unit).toBe("mg/dL");
-    expect(out.rows[0].row?.value).toBeCloseTo(5.3 * 18.016, 3);
+    // The one factor the app converts glucose by, both directions. The
+    // literal that used to sit here was 18.016 while every display path
+    // divided by 18.0182, so a reading imported in mmol/L did not read back
+    // as the number it went in as.
+    expect(out.rows[0].row?.value).toBeCloseTo(5.3 * MGDL_PER_MMOL, 3);
+    expect(mgdlToMmol(out.rows[0].row?.value ?? 0)).toBe(5.3);
   });
 
   it("converts weight lb to canonical kg", () => {
@@ -176,7 +182,7 @@ describe("parseCsvMeasurements — glucose context", () => {
     for (const result of out.rows) {
       expect(result.row).not.toHaveProperty("glucoseContext");
       expect(result.row?.unit).toBe("mg/dL");
-      expect(result.row?.value).toBeCloseTo(95.4848, 3);
+      expect(result.row?.value).toBeCloseTo(5.3 * MGDL_PER_MMOL, 3);
     }
     expect(out.rows[0].row?.measuredAt.toISOString()).toBe(
       "2024-04-03T02:15:00.000Z",