diff --git a/src/riemann.rs b/src/riemann.rs
index dfeea72..6725986 100644
--- a/src/riemann.rs
+++ b/src/riemann.rs
@@ -58,7 +58,7 @@ pub fn krist(space: &impl Metric, pos: Vec3) -> Tens3 {
 	let d = space.part_derivs_at(pos);
 	// ret[i][l][k] = sum((m) => .5f * g[m][i] * (d[k][l][m] + d[l][k][m] - d[m][k][l]))
 	make_tens3(|i, l, k| {
-		0.5 * (0..2)
+		0.5 * (0..3)
 			.map(|m| g.col(m)[i] * (d[l].col(k)[m] + d[k].col(m)[l] - d[m].col(k)[l]))
 			.sum::<f32>()
 	})
diff --git a/src/tube/metric.rs b/src/tube/metric.rs
index 74efe53..ba65a81 100644
--- a/src/tube/metric.rs
+++ b/src/tube/metric.rs
@@ -107,7 +107,7 @@ mod test {
 					let pos = vec3(x, y, z);
 					let computed = testee.part_derivs_at(pos);
 					let reference = approx.part_derivs_at(pos);
-					let eq = (0..2).all(|coord| computed[coord].abs_diff_eq(reference[coord], epsilon));
+					let eq = (0..3).all(|coord| computed[coord].abs_diff_eq(reference[coord], epsilon));
 					assert!(
 						eq,
 						"Bad derivative computation at {pos}:\n  explicit:  {computed:?}\n  numerical: {reference:?}\n"