diff --git a/crates/ekore/src/operator_matrix_elements/unpolarized/spacelike/as2.rs b/crates/ekore/src/operator_matrix_elements/unpolarized/spacelike/as2.rs
index bf74badc8..4376b084b 100644
--- a/crates/ekore/src/operator_matrix_elements/unpolarized/spacelike/as2.rs
+++ b/crates/ekore/src/operator_matrix_elements/unpolarized/spacelike/as2.rs
@@ -46,7 +46,7 @@ pub fn A_qq_ns(c: &mut Cache, _nf: u8, L: f64) -> Complex<f64> {
 /// Implements Eq. (B.1) of [\[Buza:1996wv\]](crate::bib::Buza1996wv).
 pub fn A_hq_ps(c: &mut Cache, _nf: u8, L: f64) -> Complex<f64> {
     let N = c.n();
-    let S2 = c.get(K::S1);
+    let S2 = c.get(K::S2);
     let F1M = 1.0 / (N - 1.0) * (ZETA2 - (S2 - 1.0 / N.powu(2)));
     let F11 = 1.0 / (N + 1.0) * (ZETA2 - (S2 + 1.0 / (N + 1.0).powu(2)));
     let F12 = 1.0 / (N + 2.0) * (ZETA2 - (S2 + 1.0 / (N + 1.0).powu(2) + 1.0 / (N + 2.0).powu(2)));
@@ -289,10 +289,9 @@ pub fn A_ns(c: &mut Cache, nf: u8, L: f64) -> [[Complex<f64>; 2]; 2] {
 
 #[cfg(test)]
 mod test {
-    use crate::cmplx;
-    use crate::{
-        harmonics::cache::Cache, operator_matrix_elements::unpolarized::spacelike::as2::*,
-    };
+    use super::*;
+    use crate::{assert_approx_eq_cmplx, cmplx};
+
     use float_cmp::assert_approx_eq;
     use num::complex::Complex;
     const NF: u8 = 5;
@@ -304,8 +303,7 @@ mod test {
             let N = cmplx![1., 0.];
             let mut c = Cache::new(N);
             let aNSqq2 = A_qq_ns(&mut c, NF, L);
-            assert_approx_eq!(f64, aNSqq2.re, 0.0, epsilon = 2e-11);
-            assert_approx_eq!(f64, aNSqq2.im, 0.0, epsilon = 2e-11);
+            assert_approx_eq_cmplx!(f64, aNSqq2, Complex::zero(), epsilon = 2e-11);
         }
     }
 
@@ -318,22 +316,20 @@ mod test {
             let aS2 = A_singlet(&mut c, NF, L, false);
 
             // gluon momenum conservation
-            assert_approx_eq!(
+            assert_approx_eq_cmplx!(
                 f64,
-                (aS2[0][0] + aS2[1][0] + aS2[2][0]).re,
-                0.0,
-                epsilon = 2e-6
-            );
-            assert_approx_eq!(
-                f64,
-                (aS2[0][0] + aS2[1][0] + aS2[2][0]).im,
-                0.0,
+                aS2[0][0] + aS2[1][0] + aS2[2][0],
+                Complex::zero(),
                 epsilon = 2e-6
             );
 
             // quark momentum conservation
-            // assert_approx_eq!(f64, (aS2[0][1] + aS2[1][1] + aS2[2][1]).re, 0.0, epsilon = 1e-11);
-            // assert_approx_eq!(f64, (aS2[0][1] + aS2[1][1] + aS2[2][1]).im, 0.0, epsilon = 1e-11);
+            assert_approx_eq_cmplx!(
+                f64,
+                aS2[0][1] + aS2[1][1] + aS2[2][1],
+                Complex::zero(),
+                epsilon = 1e-11
+            );
         }
     }
 }