diff --git a/backend/src/langs.ts b/backend/src/langs.ts
index dfdb03f..475c68d 100644
--- a/backend/src/langs.ts
+++ b/backend/src/langs.ts
@@ -1124,6 +1124,56 @@ l ; ; o ; * 4
  3 3 ; @ . >
   ; 2 3 < \\
    4 ; * /
+`,
+  },
+  hmmm: {
+    name: "HMMM",
+    main: "main.hmmm",
+    run: "hmmm main.hmmm",
+    hello: `72
+101
+108
+108
+111
+44
+32
+119
+111
+114
+108
+100
+33
+10
+`,
+    template: ` 0 setn r1, 72
+ 1 write r1
+ 2 setn r1, 101
+ 3 write r1
+ 4 setn r1, 108
+ 5 write r1
+ 6 setn r1, 108
+ 7 write r1
+ 8 setn r1, 111
+ 9 write r1
+10 setn r1, 44
+11 write r1
+12 setn r1, 32
+13 write r1
+14 setn r1, 119
+15 write r1
+16 setn r1, 111
+17 write r1
+18 setn r1, 114
+19 write r1
+20 setn r1, 108
+21 write r1
+22 setn r1, 100
+23 write r1
+24 setn r1, 33
+25 write r1
+26 setn r1, 10
+27 write r1
+28 halt
 `,
   },
   hy: {
diff --git a/backend/src/test-runner.ts b/backend/src/test-runner.ts
index 999ee83..9de15c5 100644
--- a/backend/src/test-runner.ts
+++ b/backend/src/test-runner.ts
@@ -182,6 +182,7 @@ class Test {
   };
 
   waitForOutput = async (pattern: string, maxLength?: number) => {
+    pattern = pattern.replace(/\n/g, "\r\n");
     let output = "";
     return await this.wait(`output ${JSON.stringify(pattern)}`, (msg: any) => {
       const prevLength = output.length;
diff --git a/scripts/docker-install-phase4.bash b/scripts/docker-install-phase4.bash
index 74f1cf1..1e7127c 100755
--- a/scripts/docker-install-phase4.bash
+++ b/scripts/docker-install-phase4.bash
@@ -161,6 +161,10 @@ wget -nv "https://github.com/sclevine/yj/releases/download/${ver}/yj-linux"
 chmod +x yj-linux
 mv yj-linux /usr/local/bin/yj
 
+# HMMM
+wget -nv https://www.cs.hmc.edu/~cs5grad/cs5/hmmm/code/hmmm -O /usr/local/bin/hmmm
+chmod +x /usr/local/bin/hmmm
+
 # Ink
 ver="$(latest_release thesephist/ink)"
 wget -nv "https://github.com/thesephist/ink/releases/download/${ver}/ink-linux"