diff --git a/lisa-utils/src/test/scala/lisa/test/ProofCheckerSuite.scala b/lisa-utils/src/test/scala/lisa/test/ProofCheckerSuite.scala
index 7f5c4e7a2c27344e4bd10da2c18a423e284f3ebd..6c3d6c4fe04861db76bbaee5963bdf54a716e503 100644
--- a/lisa-utils/src/test/scala/lisa/test/ProofCheckerSuite.scala
+++ b/lisa-utils/src/test/scala/lisa/test/ProofCheckerSuite.scala
@@ -12,48 +12,48 @@ import scala.language.adhocExtensions
 
 abstract class ProofCheckerSuite extends AnyFunSuite {
 
-    import lisa.kernel.fol.FOL.*
-
-    protected val (xl, yl, zl, wl, xpl, ypl, zpl, wpl) = (
-        VariableLabel("x"),
-        VariableLabel("y"),
-        VariableLabel("z"),
-        VariableLabel("w"),
-        VariableLabel("x'"),
-        VariableLabel("y'"),
-        VariableLabel("z'"),
-        VariableLabel("w'")
+  import lisa.kernel.fol.FOL.*
+
+  protected val (xl, yl, zl, wl, xpl, ypl, zpl, wpl) = (
+    VariableLabel("x"),
+    VariableLabel("y"),
+    VariableLabel("z"),
+    VariableLabel("w"),
+    VariableLabel("x'"),
+    VariableLabel("y'"),
+    VariableLabel("z'"),
+    VariableLabel("w'")
+  )
+  protected val (x, y, z, w, xp, yp, zp, wp) = (
+    VariableTerm(xl),
+    VariableTerm(yl),
+    VariableTerm(zl),
+    VariableTerm(wl),
+    VariableTerm(xpl),
+    VariableTerm(ypl),
+    VariableTerm(zpl),
+    VariableTerm(wpl)
+  )
+
+  protected val (sl, tl, ul, vl) = (VariableLabel("s"), VariableLabel("t"), VariableLabel("u"), VariableLabel("v"))
+  protected val (s, t, u, v) = (VariableTerm(sl), VariableTerm(tl), VariableTerm(ul), VariableTerm(vl))
+
+  def checkProof(proof: SCProof): Unit = {
+    val judgement = checkSCProof(proof)
+    println(Printer.prettySCProof(judgement))
+    println(s"\n(${proof.totalLength} proof steps in total)")
+  }
+
+  def checkProof(proof: SCProof, expected: Sequent): Unit = {
+    val judgement = checkSCProof(proof)
+    assert(judgement.isValid, "\n" + Printer.prettySCProof(judgement))
+    assert(isSameSequent(proof.conclusion, expected), s"(${Printer.prettySequent(proof.conclusion)} did not equal ${Printer.prettySequent(expected)})")
+  }
+
+  def checkIncorrectProof(incorrectProof: SCProof): Unit = {
+    assert(
+      !checkSCProof(incorrectProof).isValid,
+      s"(incorrect proof with conclusion '${Printer.prettySequent(incorrectProof.conclusion)}' was accepted by the proof checker)\nSequent: ${incorrectProof.conclusion}"
     )
-    protected val (x, y, z, w, xp, yp, zp, wp) = (
-        VariableTerm(xl),
-        VariableTerm(yl),
-        VariableTerm(zl),
-        VariableTerm(wl),
-        VariableTerm(xpl),
-        VariableTerm(ypl),
-        VariableTerm(zpl),
-        VariableTerm(wpl)
-    )
-
-    protected val (sl, tl, ul, vl) = (VariableLabel("s"), VariableLabel("t"), VariableLabel("u"), VariableLabel("v"))
-    protected val (s, t, u, v) = (VariableTerm(sl), VariableTerm(tl), VariableTerm(ul), VariableTerm(vl))
-
-    def checkProof(proof: SCProof): Unit = {
-        val judgement = checkSCProof(proof)
-        println(Printer.prettySCProof(judgement))
-        println(s"\n(${proof.totalLength} proof steps in total)")
-    }
-
-    def checkProof(proof: SCProof, expected: Sequent): Unit = {
-        val judgement = checkSCProof(proof)
-        assert(judgement.isValid, "\n" + Printer.prettySCProof(judgement))
-        assert(isSameSequent(proof.conclusion, expected), s"(${Printer.prettySequent(proof.conclusion)} did not equal ${Printer.prettySequent(expected)})")
-    }
-
-    def checkIncorrectProof(incorrectProof: SCProof): Unit = {
-        assert(
-            !checkSCProof(incorrectProof).isValid,
-            s"(incorrect proof with conclusion '${Printer.prettySequent(incorrectProof.conclusion)}' was accepted by the proof checker)\nSequent: ${incorrectProof.conclusion}"
-        )
-    }
+  }
 }