diff --git a/folding-schemes/src/commitment/ipa.rs b/folding-schemes/src/commitment/ipa.rs
index 66b8bef1..a06949eb 100644
--- a/folding-schemes/src/commitment/ipa.rs
+++ b/folding-schemes/src/commitment/ipa.rs
@@ -684,8 +684,13 @@ mod tests {
         let proofVar = ProofVar::<Projective, GVar>::new_witness(cs.clone(), || Ok(proof.0))?;
         let r_blindVar = EmulatedFpVar::<Fr, Fq>::new_witness(cs.clone(), || Ok(r_blind))?;
         let uVar_vec = Vec::<EmulatedFpVar<Fr, Fq>>::new_witness(cs.clone(), || Ok(u))?;
-        let uVar: [EmulatedFpVar<Fr, Fq>; k] =
-            uVar_vec.try_into().map_err(|_| Error::TypeConversion)?;
+        let uVar: [EmulatedFpVar<Fr, Fq>; k] = uVar_vec.try_into().map_err(|_| {
+            Error::ConversionError(
+                "Vec<_>".to_string(),
+                "[_; 1]".to_string(),
+                "variable name: uVar".to_string(),
+            )
+        })?;
         let UVar = GVar::new_witness(cs.clone(), || Ok(U))?;
 
         let v = IPAGadget::<Projective, GVar, hiding>::verify::<k>(
diff --git a/folding-schemes/src/folding/protogalaxy/decider_eth.rs b/folding-schemes/src/folding/protogalaxy/decider_eth.rs
index a1730656..08579f9d 100644
--- a/folding-schemes/src/folding/protogalaxy/decider_eth.rs
+++ b/folding-schemes/src/folding/protogalaxy/decider_eth.rs
@@ -174,10 +174,20 @@ where
         Ok(Self::Proof {
             snark_proof,
             L_X_evals,
-            kzg_proofs: kzg_proofs.try_into().map_err(|_| Error::TypeConversion)?,
-            kzg_challenges: kzg_challenges
-                .try_into()
-                .map_err(|_| Error::TypeConversion)?,
+            kzg_proofs: kzg_proofs.try_into().map_err(|_| {
+                Error::ConversionError(
+                    "Vec<_>".to_string(),
+                    "[_; 1]".to_string(),
+                    "variable name: kzg_proofs".to_string(),
+                )
+            })?,
+            kzg_challenges: kzg_challenges.try_into().map_err(|_| {
+                Error::ConversionError(
+                    "Vec<_>".to_string(),
+                    "[_; 1]".to_string(),
+                    "variable name: kzg_challenges".to_string(),
+                )
+            })?,
         })
     }
 
diff --git a/folding-schemes/src/lib.rs b/folding-schemes/src/lib.rs
index 59fe3085..2db8f711 100644
--- a/folding-schemes/src/lib.rs
+++ b/folding-schemes/src/lib.rs
@@ -122,8 +122,6 @@ pub enum Error {
     NoMultiInstances,
     #[error("Missing 'other' instances, since this is a multi-instances folding scheme. Expected number of instances, mu:{0}, nu:{1}")]
     MissingOtherInstances(usize, usize),
-    #[error("Type conversion error")]
-    TypeConversion,
 }
 
 /// FoldingScheme defines trait that is implemented by the diverse folding schemes. It is defined
diff --git a/folding-schemes/src/transcript/poseidon.rs b/folding-schemes/src/transcript/poseidon.rs
index 9377f0f8..595568a7 100644
--- a/folding-schemes/src/transcript/poseidon.rs
+++ b/folding-schemes/src/transcript/poseidon.rs
@@ -135,7 +135,11 @@ pub mod tests {
         let mut poseidon_sponge: PoseidonSponge<_> = CryptographicSponge::new(&config);
         let v: Vec<Fr> = vec!["1", "2", "3", "4"]
             .into_iter()
-            .map(|x| Fr::from_str(x).map_err(|_| Error::TypeConversion))
+            .map(|x| {
+                Fr::from_str(x).map_err(|_| {
+                    Error::ConversionError("str".to_string(), "Fr".to_string(), x.to_string())
+                })
+            })
             .collect::<Result<Vec<Fr>, Error>>()?;
         poseidon_sponge.absorb(&v);
         poseidon_sponge.squeeze_field_elements::<Fr>(1);
@@ -144,7 +148,7 @@ pub mod tests {
                 == Fr::from_str(
                     "18821383157269793795438455681495246036402687001665670618754263018637548127333"
                 )
-                .map_err(|_| Error::TypeConversion)?
+                .unwrap()
         );
         Ok(())
     }