diff --git a/test/test_benchmark_performance.py b/test/test_benchmark_performance.py
index 32c817f..8e6ff96 100644
--- a/test/test_benchmark_performance.py
+++ b/test/test_benchmark_performance.py
@@ -61,7 +61,7 @@ def test_dense_eri(molecule):
     )
     print("                                Diff cycle count:", diff)
     print("                            Diff cycle count [M]:", diff / 1e6)
-    print("Estimated time of execution on Bow-IPU [seconds]:", diff / (1.85*1e9))
+    print("Estimated time of execution on Bow-IPU [seconds]:", diff / (1.85 * 1e9))
     print(
         "----------------------------------------------------------------------------"
     )
@@ -94,7 +94,7 @@ def test_sparse_eri(molecule):
         )
     print("                                Diff cycle count:", diff)
     print("                            Diff cycle count [M]:", diff / 1e6)
-    print("Estimated time of execution on Bow-IPU [seconds]:", diff / (1.85*1e9))
+    print("Estimated time of execution on Bow-IPU [seconds]:", diff / (1.85 * 1e9))
     print(
         "----------------------------------------------------------------------------"
         )