diff --git a/test/test_BA_ABA_matrix.jl b/test/test_BA_ABA_matrix.jl
index bcbd3728..eb728061 100644
--- a/test/test_BA_ABA_matrix.jl
+++ b/test/test_BA_ABA_matrix.jl
@@ -68,7 +68,6 @@ end
     # test if error is correctly thrown when ref bus is called
     rb = collect(ba.ref_bus_positions)[1]
     @test_throws ErrorException aba[rb, :]
-
 end
 
 @testset "Test show for A, BA and ABA matrix" begin
diff --git a/test/test_ptdf.jl b/test/test_ptdf.jl
index d651c3a1..0a06ce9f 100644
--- a/test/test_ptdf.jl
+++ b/test/test_ptdf.jl
@@ -239,5 +239,4 @@ end
     slack_array = dist_slack / sum(dist_slack)
 
     @test_throws ErrorException ptdf_2 = PTDF(sys5; dist_slack = slack_array)
-
 end
diff --git a/test/test_virtual_ptdf.jl b/test/test_virtual_ptdf.jl
index cd3472fd..69cffd98 100644
--- a/test/test_virtual_ptdf.jl
+++ b/test/test_virtual_ptdf.jl
@@ -112,7 +112,6 @@ end
     test_val2 = false
     ptdf_2 = VirtualPTDF(sys5; dist_slack = slack_array)
     @test_throws ErrorException ptdf_2[1, 1]
-
 end
 
 @testset "Test Virtual PTDF auxiliary functions" begin