diff --git a/src/uu/test/src/test.rs b/src/uu/test/src/test.rs
index c220ef7e9..e6e2e5360 100644
--- a/src/uu/test/src/test.rs
+++ b/src/uu/test/src/test.rs
@@ -245,12 +245,12 @@ fn integers(a: &OsStr, b: &OsStr, op: &OsStr) -> Result<bool, String> {
     let format_err = |value: &OsStr| format!("invalid integer {}", value.quote());
 
     // Parse the two inputs
-    let a: i64 = a
+    let a: i128 = a
         .to_str()
         .and_then(|s| s.parse().ok())
         .ok_or_else(|| format_err(a))?;
 
-    let b: i64 = b
+    let b: i128 = b
         .to_str()
         .and_then(|s| s.parse().ok())
         .ok_or_else(|| format_err(b))?;
@@ -442,3 +442,28 @@ fn path(path: &OsStr, condition: &PathCondition) -> bool {
         PathCondition::Executable => false, // TODO
     }
 }
+
+#[cfg(test)]
+mod tests {
+    use super::integers;
+    use std::ffi::OsStr;
+
+    #[test]
+    fn test_integer_op() {
+        let a = OsStr::new("18446744073709551616");
+        let b = OsStr::new("0");
+        assert_eq!(integers(a, b, OsStr::new("-lt")).unwrap(), false);
+        let a = OsStr::new("18446744073709551616");
+        let b = OsStr::new("0");
+        assert_eq!(integers(a, b, OsStr::new("-gt")).unwrap(), true);
+        let a = OsStr::new("-1");
+        let b = OsStr::new("0");
+        assert_eq!(integers(a, b, OsStr::new("-lt")).unwrap(), true);
+        let a = OsStr::new("42");
+        let b = OsStr::new("42");
+        assert_eq!(integers(a, b, OsStr::new("-eq")).unwrap(), true);
+        let a = OsStr::new("42");
+        let b = OsStr::new("42");
+        assert_eq!(integers(a, b, OsStr::new("-ne")).unwrap(), false);
+    }
+}
diff --git a/tests/by-util/test_test.rs b/tests/by-util/test_test.rs
index 028babc4b..54ee03985 100644
--- a/tests/by-util/test_test.rs
+++ b/tests/by-util/test_test.rs
@@ -929,3 +929,26 @@ fn test_file_N() {
     at.touch("regular_file");
     scene.ucmd().args(&["-N", "regular_file"]).succeeds();
 }
+
+#[test]
+fn test_long_integer() {
+    let scene = TestScenario::new(util_name!());
+    scene
+        .ucmd()
+        .args(&["18446744073709551616", "-eq", "0"])
+        .fails();
+    scene
+        .ucmd()
+        .args(&["-9223372036854775809", "-ge", "18446744073709551616"])
+        .fails();
+    scene
+        .ucmd()
+        .args(&[
+            "'('",
+            "-9223372036854775809",
+            "-ge",
+            "18446744073709551616",
+            "')'",
+        ])
+        .fails();
+}