diff --git a/markdown/format.test.ts b/markdown/format.test.ts
index 489c8cb..dd1dab9 100644
--- a/markdown/format.test.ts
+++ b/markdown/format.test.ts
@@ -1,6 +1,7 @@
 import { fail } from "testing/asserts.ts";
-import { diff } from "../lib/diff.ts";
+import { getLogger } from "log/mod.ts";
 
+import { diff } from "../lib/diff.ts";
 import format from "./format.ts";
 
 /**
@@ -20,15 +21,6 @@ with a [a link](https://bobheadxi.dev) and **emphasis [bold link](https://github
 and a ![cute image](https://bobheadxi.dev/assets/images/profile.jpg).
 
 and this is another paragraph!
-
-## Math
-
-Lift($L$) can be determined by Lift Coefficient ($C_L$) like the following
-equation.
-
-$$
-L = \frac{1}{2} \rho v^2 S C_L
-$$
 `;
 const want = `---
 field: wow
@@ -40,21 +32,13 @@ hello world! this is a document.
 with a [a link](https://bobheadxi.dev) and **emphasis [bold link](https://github.com/bobheadxi)** and *italics* and ~~strike~~ and a ![cute image](https://bobheadxi.dev/assets/images/profile.jpg).
 
 and this is another paragraph!
-
-## Math
-
-Lift($L$) can be determined by Lift Coefficient ($C_L$) like the following equation.
-
-$$
-L = \frac{1}{2} \rho v^2 S C_L
-$$
 `;
 
 Deno.test({
   name: testSuite,
   fn: () => {
     const got = format(input);
-    if (diff(want, got)) {
+    if (diff(want, got, { log: getLogger() })) {
       fail("Unexpected diff");
     }
   },
diff --git a/plugins/readable/reflow.test.ts b/plugins/readable/reflow.test.ts
index ec2299a..8da893f 100644
--- a/plugins/readable/reflow.test.ts
+++ b/plugins/readable/reflow.test.ts
@@ -1,4 +1,5 @@
 import { fail } from "testing/asserts.ts";
+import { getLogger } from "log/mod.ts";
 
 import format from "../../markdown/format.ts";
 import remark from "../../lib/remark.ts";
@@ -14,7 +15,7 @@ import { lorenIpsumLines, lorenIpsumText, TestSuite } from "../../lib/test.ts";
     "plugins/readable/reflow:e2e",
     (testCase) => {
       const got = format(testCase.input, testRemark);
-      if (diff(testCase.expect, got)) {
+      if (diff(testCase.expect, got, { log: getLogger() })) {
         fail("Unexpected diff");
       }
     },