diff --git a/crates/cli/src/lib.rs b/crates/cli/src/lib.rs
index 58ede517cb..b8008806b6 100644
--- a/crates/cli/src/lib.rs
+++ b/crates/cli/src/lib.rs
@@ -1091,53 +1091,23 @@ unsafe fn roc_run_native_debug(
 }
 
 fn render_expect_panic<'a>(
-    _arena: &'a Bump,
+    arena: &'a Bump,
     expect: ToplevelExpect,
     message: &str,
     expectations: &mut VecMap<ModuleId, Expectations>,
     interns: &'a Interns,
 ) {
-    use roc_reporting::report::Report;
-    use roc_reporting::report::RocDocAllocator;
-    use ven_pretty::DocAllocator;
-
     let module_id = expect.symbol.module_id();
     let data = expectations.get_mut(&module_id).unwrap();
 
-    // TODO cache these line offsets?
     let path = &data.path;
     let filename = data.path.to_owned();
-    let file_string = std::fs::read_to_string(path).unwrap();
-    let src_lines: Vec<_> = file_string.lines().collect();
+    let source = std::fs::read_to_string(path).unwrap();
 
-    let line_info = roc_region::all::LineInfo::new(&file_string);
-    let line_col_region = line_info.convert_region(expect.region);
-
-    let alloc = RocDocAllocator::new(&src_lines, module_id, interns);
-
-    let doc = alloc.stack([
-        alloc.text("This expectation crashed while running:"),
-        alloc.region(line_col_region),
-        alloc.text("The crash reported this message:"),
-        alloc.text(message),
-    ]);
-
-    let report = Report {
-        title: "EXPECT FAILED".into(),
-        doc,
-        filename,
-        severity: roc_reporting::report::Severity::RuntimeError,
-    };
-
-    let mut buf = String::new();
-
-    report.render(
-        roc_reporting::report::RenderTarget::ColorTerminal,
-        &mut buf,
-        &alloc,
-        &roc_reporting::report::DEFAULT_PALETTE,
-    );
+    use roc_reporting::error::expect::Renderer;
 
+    let renderer = Renderer::new(arena, interns, module_id, filename, &source);
+    let buf = renderer.render_panic(message, expect.region);
     println!("{}", buf);
 }
 
@@ -1209,7 +1179,7 @@ fn render_expect_failure<'a>(
     use roc_reporting::error::expect::Renderer;
 
     let renderer = Renderer::new(arena, interns, module_id, filename, &source);
-    let buf = renderer.render(
+    let buf = renderer.render_failure(
         subs,
         &symbols,
         &variables,
diff --git a/crates/reporting/src/error/expect.rs b/crates/reporting/src/error/expect.rs
index 84c9f9db92..5b225d82c9 100644
--- a/crates/reporting/src/error/expect.rs
+++ b/crates/reporting/src/error/expect.rs
@@ -121,7 +121,7 @@ impl<'a> Renderer<'a> {
         self.line_info.convert_region(display_region)
     }
 
-    pub fn render(
+    pub fn render_failure(
         &self,
         subs: &mut Subs,
         symbols: &[Symbol],
@@ -153,4 +153,36 @@ impl<'a> Renderer<'a> {
 
         buf
     }
+
+    pub fn render_panic(&self, message: &str, expect_region: Region) -> String {
+        use crate::report::Report;
+        use ven_pretty::DocAllocator;
+
+        let line_col_region = self.line_info.convert_region(expect_region);
+
+        let doc = self.alloc.stack([
+            self.alloc.text("This expectation crashed while running:"),
+            self.alloc.region(line_col_region),
+            self.alloc.text("The crash reported this message:"),
+            self.alloc.text(message),
+        ]);
+
+        let report = Report {
+            title: "EXPECT PANICKED".into(),
+            doc,
+            filename: self.filename.clone(),
+            severity: crate::report::Severity::RuntimeError,
+        };
+
+        let mut buf = String::new();
+
+        report.render(
+            crate::report::RenderTarget::ColorTerminal,
+            &mut buf,
+            &self.alloc,
+            &crate::report::DEFAULT_PALETTE,
+        );
+
+        buf
+    }
 }