diff --git a/Changelog.md b/Changelog.md
index f0a460272c..6f11bd52ca 100644
--- a/Changelog.md
+++ b/Changelog.md
@@ -1,5 +1,11 @@
 # Changelog
 
+## [v2.5.1]
+
+### 🐛 Bug fixes
+
+- Fix bug in syntax highlighting caused by incorrect function call (#7187)
+
 ## [v2.5.0]
 
 ### ✨ New features and improvements
diff --git a/Gemfile.lock b/Gemfile.lock
index 59a9f66a1b..af1e64f195 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -128,7 +128,7 @@ GEM
     combine_pdf (1.0.26)
       matrix
       ruby-rc4 (>= 0.1.5)
-    concurrent-ruby (1.3.3)
+    concurrent-ruby (1.3.4)
     config (5.5.1)
       deep_merge (~> 1.2, >= 1.2.1)
     connection_pool (2.4.1)
@@ -183,7 +183,7 @@ GEM
       dry-schema (>= 1.12, < 2)
       zeitwerk (~> 2.6)
     erubi (1.13.0)
-    et-orbi (1.2.7)
+    et-orbi (1.2.11)
       tzinfo
     exception_notification (4.5.0)
       actionmailer (>= 5.2, < 8)
@@ -197,8 +197,8 @@ GEM
     faker (3.4.2)
       i18n (>= 1.8.11, < 2)
     ffi (1.16.3)
-    fugit (1.9.0)
-      et-orbi (~> 1, >= 1.2.7)
+    fugit (1.11.1)
+      et-orbi (~> 1, >= 1.2.11)
       raabro (~> 1.4)
     fuubar (2.5.1)
       rspec-core (~> 3.0)
@@ -380,7 +380,7 @@ GEM
       redis (>= 3.3)
       resque (>= 1.27)
       rufus-scheduler (~> 3.2, != 3.3)
-    rexml (3.3.4)
+    rexml (3.3.6)
       strscan
     rmagick (6.0.1)
       observer (~> 0.1)
diff --git a/app/MARKUS_VERSION b/app/MARKUS_VERSION
index 30acdc6b3c..3c981334fc 100644
--- a/app/MARKUS_VERSION
+++ b/app/MARKUS_VERSION
@@ -1 +1 @@
-VERSION=v2.5.0,PATCH_LEVEL=DEV
+VERSION=v2.5.1,PATCH_LEVEL=DEV
diff --git a/app/assets/javascripts/Components/Result/text_viewer.jsx b/app/assets/javascripts/Components/Result/text_viewer.jsx
index eadb5306a0..b3fad2514d 100644
--- a/app/assets/javascripts/Components/Result/text_viewer.jsx
+++ b/app/assets/javascripts/Components/Result/text_viewer.jsx
@@ -115,7 +115,7 @@ export class TextViewer extends React.PureComponent {
       }
     }
     if (currLine.textContent.length > 0) {
-      nodeLines.appendChild(currLine);
+      nodeLines.push(currLine);
     }
     nodeLines.push(this.raw_content.current.lastChild.cloneNode(true));
     while (this.raw_content.current.firstChild) {
diff --git a/app/assets/javascripts/Components/__tests__/text_viewer.test.jsx b/app/assets/javascripts/Components/__tests__/text_viewer.test.jsx
index 30b1e10bca..373eae78aa 100644
--- a/app/assets/javascripts/Components/__tests__/text_viewer.test.jsx
+++ b/app/assets/javascripts/Components/__tests__/text_viewer.test.jsx
@@ -5,7 +5,9 @@ import {TextViewer} from "../Result/text_viewer";
 describe("TextViewer", () => {
   let props;
 
-  beforeEach(() => {
+  afterEach(cleanup);
+
+  it("should render its text content when the content ends with a new line", () => {
     props = {
       content: "def f(n: int) -> int:\n    return n + 1\n",
       annotations: [],
@@ -14,11 +16,20 @@ describe("TextViewer", () => {
     };
 
     render(<TextViewer {...props} />);
+
+    expect(screen.getByText("def f(n: int) -> int:")).toBeInTheDocument();
   });
 
-  afterEach(cleanup);
+  it("should render its text content when the content doesn't end with a new line", () => {
+    props = {
+      content: "def f(n: int) -> int:\n    return n + 1",
+      annotations: [],
+      focusLine: null,
+      submission_file_id: 1,
+    };
+
+    render(<TextViewer {...props} />);
 
-  it("should render its text content", () => {
     expect(screen.getByText("def f(n: int) -> int:")).toBeInTheDocument();
   });
 });