diff --git a/Dockerfile b/Dockerfile
index 5194c27..940e625 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,6 +1,11 @@
 FROM alpine:3.22
 
-RUN apk add --no-cache jq nushell
+RUN apk add --no-cache jq curl && \
+    curl -Lo nu.tgz https://github.com/nushell/nushell/releases/download/0.111.0/nu-0.111.0-x86_64-unknown-linux-musl.tar.gz && \
+    gunzip nu.tgz && \
+    tar xvf nu.tar  && \
+    mv nu-0.111.0-x86_64-unknown-linux-musl/nu /usr/bin 
+    
 
 WORKDIR /opt/test-runner
 COPY . .
diff --git a/bin/run.sh b/bin/run.sh
index 4669299..6d44599 100755
--- a/bin/run.sh
+++ b/bin/run.sh
@@ -40,7 +40,7 @@ if [ $? -eq 0 ]; then
 else
     status="error"
     case "$test_output" in 
-        *"Assertion failed"*)
+        *"These are not equal"*)
             status="fail"
             ;;
     esac
diff --git a/tests/all-fail/expected_results.json b/tests/all-fail/expected_results.json
index 8c5273c..f141c01 100644
--- a/tests/all-fail/expected_results.json
+++ b/tests/all-fail/expected_results.json
@@ -1,5 +1,5 @@
 {
   "version": 1,
   "status": "fail",
-  "message": "Error:   x Assertion failed.\n   tests.nu:3:14]\n 2 | use assert\n 3 | assert equal (hello) \"Hello, World!\"\n   :              ^^^^^^^^^^^|^^^^^^^^^^^\n   :                         `-| These are not equal.\n   :                           |         Left  : '\"Goodbye, Mars!\"'\n   :                           |         Right : '\"Hello, World!\"'\n   `----"
+  "message": "Error: nu::shell::error\n\n  x These are not equal.\n   tests.nu:3:14]\n 2 | use assert\n 3 | assert equal (hello) \"Hello, World!\"\n   :              ^^^|^^^ ^^^^^^^|^^^^^^^\n   :                 |           `-- right: \"Hello, World!\"\n   :                 `-- left: \"Goodbye, Mars!\"\n   `----"
 }
diff --git a/tests/partial-fail/expected_results.json b/tests/partial-fail/expected_results.json
index 94ff6ea..812a185 100644
--- a/tests/partial-fail/expected_results.json
+++ b/tests/partial-fail/expected_results.json
@@ -1,5 +1,5 @@
 {
   "version": 1,
   "status": "fail",
-  "message": "Error:   x Assertion failed.\n   tests.nu:4:14]\n 3 | assert equal (two_fer \"Alice\") \"One for Alice, one for me.\"\n 4 | assert equal (two_fer) \"One for you, one for me.\"\n   :              ^^^^^^^^^^^^^^^^^^|^^^^^^^^^^^^^^^^^\n   :                                `-| These are not equal.\n   :                                  |         Left  : '\"One for foo, one for me.\"'\n   :                                  |         Right : '\"One for you, one for me.\"'\n   `----"
+  "message": "Error: nu::shell::error\n\n  x These are not equal.\n   tests.nu:4:14]\n 3 | assert equal (two_fer \"Alice\") \"One for Alice, one for me.\"\n 4 | assert equal (two_fer) \"One for you, one for me.\"\n   :              ^^^^|^^^^ ^^^^^^^^^^^^^|^^^^^^^^^^^^\n   :                  |                  `-- right: \"One for you, one for me.\"\n   :                  `-- left: \"One for foo, one for me.\"\n   `----"
 }