diff --git a/subjects/doppelgangerprog.en.md b/subjects/doppelgangerprog.en.md
index 5ba026ac..3df66594 100644
--- a/subjects/doppelgangerprog.en.md
+++ b/subjects/doppelgangerprog.en.md
@@ -17,18 +17,22 @@ func DoppelGanger(s, substr string) int {
 ```go
 package main
 
-import "fmt"
+import (
+	piscine ".."
+
+	"fmt"
+)
 
 func main() {
 	var result int
 
-	result = DoppelGanger("aaaaaaa", "a")
+	result = piscine.DoppelGanger("aaaaaaa", "a")
 	fmt.Println(result) // 6
 
-	result = DoppelGanger("qwerty", "t")
+	result = piscine.DoppelGanger("qwerty", "t")
 	fmt.Println(result) // 4
 
-	result = DoppelGanger("a", "b")
+	result = piscine.DoppelGanger("a", "b")
 	fmt.Println(result) // -1
 }
 ```
diff --git a/subjects/findprevprimeprog.en.md b/subjects/findprevprimeprog.en.md
index 08643fac..c095ab1e 100644
--- a/subjects/findprevprimeprog.en.md
+++ b/subjects/findprevprimeprog.en.md
@@ -21,11 +21,15 @@ Here is a possible [program](TODO-LINK) to test your function :
 ```go
 package main
 
-import "fmt"
+import (
+	piscine ".."
+
+	"fmt"
+)
 
 func main() {
-	fmt.Println(FindPrevPrime(5))
-	fmt.Println(FindPrevPrime(4))
+	fmt.Println(piscine.FindPrevPrime(5))
+	fmt.Println(piscine.FindPrevPrime(4))
 }
 ```
 
diff --git a/subjects/halfcontestprog.en.md b/subjects/halfcontest.en.md
similarity index 100%
rename from subjects/halfcontestprog.en.md
rename to subjects/halfcontest.en.md
diff --git a/subjects/printrevcombprog.en.md b/subjects/printrevcomb.en.md
similarity index 100%
rename from subjects/printrevcombprog.en.md
rename to subjects/printrevcomb.en.md
diff --git a/subjects/reachablenumberprog.en.md b/subjects/reachablenumber.en.md
similarity index 100%
rename from subjects/reachablenumberprog.en.md
rename to subjects/reachablenumber.en.md
diff --git a/subjects/sliceprog.en.md b/subjects/sliceprog.en.md
index 86edbe49..9ca8ffe3 100644
--- a/subjects/sliceprog.en.md
+++ b/subjects/sliceprog.en.md
@@ -2,7 +2,7 @@
 
 ### Instructions
 
-Write a **function** that replicates the javascript function `slice`.
+Write a **function** that replicates the JavaScript function `slice`.
 
 The function receives a slice of strings and one or more integers, and returns a slice of strings. The returned slice is part of the received one but cut from the position indicated in the first int, until the position indicated by the second int.
 
@@ -25,24 +25,28 @@ Here is a possible program to test your function :
 ```go
 package main
 
-import "fmt"
+import (
+	"fmt"
+
+	piscine ".."
+)
 
 func main(){
     a := []string{"coding", "algorithm", "ascii", "package", "golang"}
-    fmt.Println(Slice(a, 1))
-    fmt.Println(Slice(a, 2, 4))
-    fmt.Println(Slice(a, -3))
-    fmt.Println(Slice(a, -2, -1))
-    fmt.Println(Slice(a, 2, 0))
+    fmt.Printf("%#v\n", piscine.Slice(a, 1))
+    fmt.Printf("%#v\n", piscine.Slice(a, 2, 4))
+    fmt.Printf("%#v\n", piscine.Slice(a, -3))
+    fmt.Printf("%#v\n", piscine.Slice(a, -2, -1))
+    fmt.Printf("%#v\n", piscine.Slice(a, 2, 0))
 }
 ```
 
 ```console
 student@ubuntu:~/student/test$ go build
 student@ubuntu:~/student/test$ ./test
-[algorithm ascii package golang]
-[ascii package]
-[ascii package golang]
-[package]
-[]
+[]string{"algorithm", "ascii", "package", "golang"}
+[]string{"ascii", "package"}
+[]string{"ascii", "package", "golang"}
+[]string{"package"}
+[]string(nil)
 ```
diff --git a/tests/go/solutions/printrevcombprog/main.go b/tests/go/solutions/printrevcomb/main.go
similarity index 100%
rename from tests/go/solutions/printrevcombprog/main.go
rename to tests/go/solutions/printrevcomb/main.go
diff --git a/tests/go/solutions/printrevcombprog/test_printrevcombprog.go b/tests/go/solutions/printrevcomb/test_printrevcombprog.go
similarity index 100%
rename from tests/go/solutions/printrevcombprog/test_printrevcombprog.go
rename to tests/go/solutions/printrevcomb/test_printrevcombprog.go
diff --git a/tests/go/solutions/sliceprog/test_sliceprog.go b/tests/go/solutions/sliceprog/test_sliceprog.go
index 7064d708..02d32098 100644
--- a/tests/go/solutions/sliceprog/test_sliceprog.go
+++ b/tests/go/solutions/sliceprog/test_sliceprog.go
@@ -41,6 +41,6 @@ func main() {
 	}
 
 	for _, a := range arr {
-		z01.Challenge("SliceProg", student.Slice, correct.Slice, a...)
+		z01.Challenge("Slice", student.Slice, correct.Slice, a...)
 	}
 }
diff --git a/tests/go/solutions/doppelgangerprog/test_doppelgangerprog.go b/tests/go/test_doppelganger.go
similarity index 100%
rename from tests/go/solutions/doppelgangerprog/test_doppelgangerprog.go
rename to tests/go/test_doppelganger.go
diff --git a/tests/go/solutions/findprevprimeprog/test_findprevprimeprog.go b/tests/go/test_findprevprime.go
similarity index 100%
rename from tests/go/solutions/findprevprimeprog/test_findprevprimeprog.go
rename to tests/go/test_findprevprime.go
diff --git a/tests/go/solutions/halfcontestprog/test_halfcontestprog.go b/tests/go/test_halfcontest.go
similarity index 100%
rename from tests/go/solutions/halfcontestprog/test_halfcontestprog.go
rename to tests/go/test_halfcontest.go