diff --git a/Pantograph/Goal.lean b/Pantograph/Goal.lean
index be745f4..8d29aa8 100644
--- a/Pantograph/Goal.lean
+++ b/Pantograph/Goal.lean
@@ -10,8 +10,6 @@ import Lean
 namespace Pantograph
 open Lean
 
-def filename: String := "<pantograph>"
-
 /--
 Represents an interconnected set of metavariables, or a state in proof search
  -/
@@ -224,7 +222,7 @@ protected def GoalState.tryTactic (state: GoalState) (goal: MVarId) (tactic: Str
     (env := ← MonadEnv.getEnv)
     (catName := if state.isConv then `conv else `tactic)
     (input := tactic)
-    (fileName := filename) with
+    (fileName := ← getFileName) with
     | .ok stx => pure $ stx
     | .error error => return .parseError error
   state.tryTacticM goal $ Elab.Tactic.evalTactic tactic
@@ -236,7 +234,7 @@ protected def GoalState.tryAssign (state: GoalState) (goal: MVarId) (expr: Strin
     (env := ← MonadEnv.getEnv)
     (catName := `term)
     (input := expr)
-    (fileName := filename) with
+    (fileName := ← getFileName) with
     | .ok syn => pure syn
     | .error error => return .parseError error
   state.tryTacticM goal $ Tactic.evalAssign expr
@@ -250,7 +248,7 @@ protected def GoalState.tryLet (state: GoalState) (goal: MVarId) (binderName: St
     (env := ← MonadEnv.getEnv)
     (catName := `term)
     (input := type)
-    (fileName := filename) with
+    (fileName := ← getFileName) with
     | .ok syn => pure syn
     | .error error => return .parseError error
   state.tryTacticM goal $ Tactic.evalLet binderName.toName type
@@ -337,7 +335,7 @@ protected def GoalState.tryCalc (state: GoalState) (goal: MVarId) (pred: String)
     (env := state.env)
     (catName := `term)
     (input := pred)
-    (fileName := filename) with
+    (fileName := ← getFileName) with
     | .ok syn => pure syn
     | .error error => return .parseError error
   goal.checkNotAssigned `GoalState.tryCalc
diff --git a/Test/Common.lean b/Test/Common.lean
index 212e164..53adaa0 100644
--- a/Test/Common.lean
+++ b/Test/Common.lean
@@ -95,19 +95,19 @@ def runTermElabMSeq (env: Environment) (termElabM: Elab.TermElabM LSpec.TestSeq)
 
 def exprToStr (e: Expr): Lean.MetaM String := toString <$> Meta.ppExpr e
 
-def strToTermSyntax [Monad m] [MonadEnv m] (s: String): m Syntax := do
+def strToTermSyntax (s: String): CoreM Syntax := do
   let .ok stx := Parser.runParserCategory
     (env := ← MonadEnv.getEnv)
     (catName := `term)
     (input := s)
-    (fileName := filename) | panic! s!"Failed to parse {s}"
+    (fileName := ← getFileName) | panic! s!"Failed to parse {s}"
   return stx
 def parseSentence (s: String): Elab.TermElabM Expr := do
   let stx ← match Parser.runParserCategory
     (env := ← MonadEnv.getEnv)
     (catName := `term)
     (input := s)
-    (fileName := filename) with
+    (fileName := ← getFileName) with
     | .ok syn => pure syn
     | .error error => throwError "Failed to parse: {error}"
   Elab.Term.elabTerm (stx := stx) .none
diff --git a/Test/Tactic/MotivatedApply.lean b/Test/Tactic/MotivatedApply.lean
index 4fb05e3..61d7d6c 100644
--- a/Test/Tactic/MotivatedApply.lean
+++ b/Test/Tactic/MotivatedApply.lean
@@ -28,7 +28,7 @@ def test_nat_brec_on : TestT Elab.TermElabM Unit := do
       (env := ← MonadEnv.getEnv)
       (catName := `term)
       (input := "@Nat.brecOn")
-      (fileName := filename) with
+      (fileName := ← getFileName) with
       | .ok syn => pure syn
       | .error error => throwError "Failed to parse: {error}"
     -- Apply the tactic
@@ -52,7 +52,7 @@ def test_list_brec_on : TestT Elab.TermElabM Unit := do
       (env := ← MonadEnv.getEnv)
       (catName := `term)
       (input := "@List.brecOn")
-      (fileName := filename) with
+      (fileName := ← getFileName) with
       | .ok syn => pure syn
       | .error error => throwError "Failed to parse: {error}"
     -- Apply the tactic
@@ -74,7 +74,7 @@ def test_partial_motive_instantiation : TestT Elab.TermElabM Unit := do
     (env := ← MonadEnv.getEnv)
     (catName := `term)
     (input := "@Nat.brecOn")
-    (fileName := filename) with
+    (fileName := ← getFileName) with
     | .ok syn => pure syn
     | .error error => throwError "Failed to parse: {error}"
   let expr ← parseSentence expr
diff --git a/Test/Tactic/NoConfuse.lean b/Test/Tactic/NoConfuse.lean
index ac277e2..93f0606 100644
--- a/Test/Tactic/NoConfuse.lean
+++ b/Test/Tactic/NoConfuse.lean
@@ -15,7 +15,7 @@ def test_nat : TestT Elab.TermElabM Unit := do
       (env := ← MonadEnv.getEnv)
       (catName := `term)
       (input := "h")
-      (fileName := filename) with
+      (fileName := ← getFileName) with
       | .ok syn => pure syn
       | .error error => throwError "Failed to parse: {error}"
     -- Apply the tactic
@@ -32,7 +32,7 @@ def test_nat_fail : TestT Elab.TermElabM Unit := do
       (env := ← MonadEnv.getEnv)
       (catName := `term)
       (input := "h")
-      (fileName := filename) with
+      (fileName := ← getFileName) with
       | .ok syn => pure syn
       | .error error => throwError "Failed to parse: {error}"
     -- Apply the tactic
@@ -52,7 +52,7 @@ def test_list : TestT Elab.TermElabM Unit := do
       (env := ← MonadEnv.getEnv)
       (catName := `term)
       (input := "h")
-      (fileName := filename) with
+      (fileName := ← getFileName) with
       | .ok syn => pure syn
       | .error error => throwError "Failed to parse: {error}"
     -- Apply the tactic
diff --git a/Test/Tactic/Prograde.lean b/Test/Tactic/Prograde.lean
index 132718a..b3347cb 100644
--- a/Test/Tactic/Prograde.lean
+++ b/Test/Tactic/Prograde.lean
@@ -15,7 +15,7 @@ def test_define : TestT Elab.TermElabM Unit := do
       (env := ← MonadEnv.getEnv)
       (catName := `term)
       (input := "Or.inl h")
-      (fileName := filename) with
+      (fileName := ← getFileName) with
       | .ok syn => pure syn
       | .error error => throwError "Failed to parse: {error}"
     -- Apply the tactic