diff --git a/src/mcdm.jl b/src/mcdm.jl
index 0bc9d65..d00a42d 100644
--- a/src/mcdm.jl
+++ b/src/mcdm.jl
@@ -73,9 +73,9 @@ function mcdm(
     elseif method isa ArasMethod
         aras(df, w, fns)
     elseif method isa CocosoMethod
-        cocoso(df, w, fns, lambda = method.lambda)
+        cocoso(df, w, fns, lambda=method.lambda)
     elseif method isa CodasMethod
-        codas(df, w, fns, tau = method.tau)
+        codas(df, w, fns, tau=method.tau)
     elseif method isa CoprasMethod
         copras(df, w, fns)
     elseif method isa ROVMethod
@@ -83,7 +83,7 @@ function mcdm(
     elseif method isa EdasMethod
         edas(df, w, fns)
     elseif method isa GreyMethod
-        grey(df, w, fns, zeta = method.zeta)
+        grey(df, w, fns, zeta=method.zeta)
     elseif method isa MabacMethod
         mabac(df, w, fns)
     elseif method isa MaircaMethod
@@ -95,9 +95,9 @@ function mcdm(
     elseif method isa SawMethod
         saw(df, w, fns)
     elseif method isa VikorMethod
-        vikor(df, w, fns, v = method.v)
+        vikor(df, w, fns, v=method.v)
     elseif method isa WaspasMethod
-        waspas(df, w, fns, lambda = method.lambda)
+        waspas(df, w, fns, lambda=method.lambda)
     elseif method isa WPMMethod
         wpm(df, w, fns)
     elseif method isa MarcosMethod
@@ -145,10 +145,7 @@ julia> # mcdm(setting, GreyMethod(0.6))
 ```
 
 """
-function mcdm(
-    setting::MCDMSetting,
-    method::T1 = TopsisMethod(),
-)::MCDMResult where {T1<:MCDMMethod}
+function mcdm(setting::MCDMSetting, method::T1=TopsisMethod())::MCDMResult where {T1<:MCDMMethod}
 
     mcdm(setting.df, setting.weights, setting.fns, method)
 end
diff --git a/test/testgreymcdm.jl b/test/testgreymcdm.jl
index ddfbed3..8023184 100644
--- a/test/testgreymcdm.jl
+++ b/test/testgreymcdm.jl
@@ -74,7 +74,7 @@ using Test
         ]
 
 
-        for i = 1:length(knownscores)
+        for i = eachindex(knownscores)
             @test isapprox(result.scores[i], knownscores[i], atol = tol)
         end
 
@@ -118,7 +118,7 @@ using Test
             GreyNumber(2.519094173200623),
         ]
 
-        for i = 1:length(knownscores)
+        for i = eachindex(knownscores)
             @test isapprox(result.scores[i], knownscores[i], atol = tol)
         end
     end
@@ -152,7 +152,7 @@ using Test
             GreyNumber(0.188656204),
         ]
 
-        for i = 1:length(knownscores)
+        for i = eachindex(knownscores)
             @test isapprox(result.scores[i], knownscores[i], atol = tol)
         end
 
@@ -251,7 +251,7 @@ using Test
             GreyNumber(1.00000),
         ]
 
-        for i = 1:length(knownscores)
+        for i = eachindex(knownscores)
             @test isapprox(result.scores[i], knownscores[i], atol = tol)
         end
     end
@@ -289,7 +289,7 @@ using Test
             GreyNumber(0.385194),
         ]
 
-        for i = 1:length(knownscores)
+        for i = eachindex(knownscores)
             @test isapprox(result.scores[i], knownscores[i], atol = tol)
         end
 
@@ -323,7 +323,7 @@ using Test
             GreyNumber(0.34452),
             GreyNumber(0.20035),
         ]
-        for i = 1:length(knownscores)
+        for i = eachindex(knownscores)
             @test isapprox(result.scores[i], knownscores[i], atol = tol)
         end
     end
@@ -353,7 +353,7 @@ using Test
             GreyNumber(0.1454237),
         ]
 
-        for i = 1:length(knownscores)
+        for i = eachindex(knownscores)
             @test isapprox(result.scores[i], knownscores[i], atol = tol)
         end
 
@@ -385,7 +385,7 @@ using Test
             GreyNumber(0.6625969061),
             GreyNumber(0.6611032076),
         ]
-        for i = 1:length(knownscores)
+        for i = eachindex(knownscores)
             @test isapprox(result.scores[i], knownscores[i], atol = tol)
         end
     end
@@ -415,7 +415,7 @@ using Test
                 GreyNumber(0.01926526),
             ]
 
-            for i = 1:length(knownscores)
+            for i = eachindex(knownscores)
                 @test isapprox(result.scores[i], knownscores[i], atol = tol)
             end
         end
@@ -490,7 +490,7 @@ using Test
 
         @test result.rankings == [1, 2, 3, 4]
         @test result.bestIndex == 4
-        for i = 1:length(knownscores)
+        for i = eachindex(knownscores)
             @test isapprox(result.scores[i], knownscores[i], atol = tol)
         end
     end
@@ -522,7 +522,7 @@ using Test
             GreyNumber(1.0884916686098811),
         ]
 
-        for i = 1:length(knownscores)
+        for i = eachindex(knownscores)
             @test isapprox(result.scores[i], knownscores[i], atol = tol)
         end
 
@@ -557,7 +557,7 @@ using Test
 
         @test result.ranks == [4, 2, 3, 1]
 
-        for i = 1:length(knownscores)
+        for i = eachindex(knownscores)
             @test isapprox(result.scores[i], knownscores[i], atol = tol)
         end
     end
@@ -591,7 +591,7 @@ using Test
                 GreyNumber(0.784976),
             ]
 
-            for i = 1:length(knownscores)
+            for i = eachindex(knownscores)
                 @test isapprox(result.scores[i], knownscores[i], atol = tol)
             end
         end
@@ -623,7 +623,7 @@ using Test
             @test result.bestIndex == 3
             @test result.ranking == [3, 2, 5, 1, 4]
 
-            for i = 1:length(knownscores)
+            for i = eachindex(knownscores)
                 @test isapprox(result.scores[i], knownscores[i], atol = tol)
             end
         end
@@ -657,7 +657,7 @@ using Test
             GreyNumber(0.788239),
         ]
 
-        for i = 1:length(knownscores)
+        for i = eachindex(knownscores)
             @test isapprox(result.scores[i], knownscores[i], atol = tol)
         end
     end
@@ -688,7 +688,7 @@ using Test
             GreyNumber(0.7873956894791),
             GreyNumber(0.7674278741782),
         ]
-        for i = 1:length(knownscores)
+        for i = eachindex(knownscores)
             @test isapprox(result.scores[i], knownscores[i], atol = tol)
         end
     end