diff --git a/src/MicrophysicsNonEq.jl b/src/MicrophysicsNonEq.jl
index 5f14a826d..4e95ebfab 100644
--- a/src/MicrophysicsNonEq.jl
+++ b/src/MicrophysicsNonEq.jl
@@ -144,8 +144,8 @@ function conv_q_vap_to_q_liq_ice_MM2015_timeintegrator(
     w::FT,
     p_air::FT,
     const_dt::FT,
-    type::String,
-) where {FT}
+    ::Val{type},
+) where {FT, type}
 
     cₚ_air = TD.cp_m(tps, q)
     Lₛ = TD.latent_heat_sublim(tps, T)
@@ -184,19 +184,21 @@ function conv_q_vap_to_q_liq_ice_MM2015_timeintegrator(
 
     δ_0 = qᵥ - qᵥ_sat_liq
 
-    if type == "condensation"
+    if type == :condensation
         cond_rate =
             A_c * τ / (liquid.τ_relax * Γₗ) +
             (δ_0 - A_c * τ) * τ / (const_dt * liquid.τ_relax * Γₗ) *
             (FT(1) - exp(-const_dt / τ))
         return cond_rate
-    elseif type == "deposition"
+    elseif type == :deposition
         dep_rate =
             A_c * τ / (ice.τ_relax * Γᵢ) +
             (δ_0 - A_c * τ) * τ / (const_dt * ice.τ_relax * Γᵢ) *
             (FT(1) - exp(-const_dt / τ)) +
             (qᵥ_sat_liq - qᵥ_sat_ice) / (ice.τ_relax * Γᵢ)
         return dep_rate
+    else
+        error("please specify condensation or deposition")
     end
 
 end
diff --git a/test/gpu_tests.jl b/test/gpu_tests.jl
index bda618dcb..99d2b8574 100644
--- a/test/gpu_tests.jl
+++ b/test/gpu_tests.jl
@@ -136,7 +136,7 @@ end
             w[i],
             p[i],
             const_dt[i],
-            "deposition",
+            Val(:condensation),
         )
         output[3, i] = CMN.conv_q_vap_to_q_liq_ice(
             ice,
diff --git a/test/microphysics_noneq_tests.jl b/test/microphysics_noneq_tests.jl
index 09fa54213..dc91b5d41 100644
--- a/test/microphysics_noneq_tests.jl
+++ b/test/microphysics_noneq_tests.jl
@@ -106,22 +106,22 @@ function test_microphysics_noneq(FT)
 
         #! format: off
         # test sign
-        TT.@test CMNe.conv_q_vap_to_q_liq_ice_MM2015_timeintegrator(liquid, ice, tps, qₚ(FT(0.5 * qᵥ_sl)), ρ, T, w, p_air, const_dt, "condensation") < FT(0)
-        TT.@test CMNe.conv_q_vap_to_q_liq_ice_MM2015_timeintegrator(liquid, ice, tps, qₚ(FT(1.5 * qᵥ_sl)), ρ, T, w, p_air, const_dt, "condensation") > FT(0)
+        TT.@test CMNe.conv_q_vap_to_q_liq_ice_MM2015_timeintegrator(liquid, ice, tps, qₚ(FT(0.5 * qᵥ_sl)), ρ, T, w, p_air, const_dt, Val(:condensation)) < FT(0)
+        TT.@test CMNe.conv_q_vap_to_q_liq_ice_MM2015_timeintegrator(liquid, ice, tps, qₚ(FT(1.5 * qᵥ_sl)), ρ, T, w, p_air, const_dt, Val(:condensation)) > FT(0)
         # wouldnt be zero as a result of WBF
         #TT.@test CMNe.conv_q_vap_to_q_liq_ice_MM2015_timeintegrator(liquid, ice, tps, qₚ(       qᵥ_sl), ρ, T, FT(0), p_air, const_dt, "condensation") ≈ FT(0) rtol = 1e-6
 
-        TT.@test CMNe.conv_q_vap_to_q_liq_ice_MM2015_timeintegrator(liquid, ice, tps, qₚ(FT(0.5 * qᵥ_si)), ρ, T, w, p_air, const_dt, "deposition") < FT(0)
-        TT.@test CMNe.conv_q_vap_to_q_liq_ice_MM2015_timeintegrator(liquid, ice, tps, qₚ(FT(1.5 * qᵥ_si)), ρ, T, w, p_air, const_dt, "deposition") > FT(0)
+        TT.@test CMNe.conv_q_vap_to_q_liq_ice_MM2015_timeintegrator(liquid, ice, tps, qₚ(FT(0.5 * qᵥ_si)), ρ, T, w, p_air, const_dt, Val(:deposition)) < FT(0)
+        TT.@test CMNe.conv_q_vap_to_q_liq_ice_MM2015_timeintegrator(liquid, ice, tps, qₚ(FT(1.5 * qᵥ_si)), ρ, T, w, p_air, const_dt, Val(:deposition)) > FT(0)
         #TT.@test CMNe.conv_q_vap_to_q_liq_ice_MM2015_timeintegrator(liquid, ice, tps, qₚ(       qᵥ_si), ρ, T, FT(0), p_air, const_dt, "deposition") ≈ FT(0) rtol = 1e-6
 
         # smoke test for values
-        TT.@test CMNe.conv_q_vap_to_q_liq_ice_MM2015_timeintegrator(liquid, ice, tps, qₚ(FT(1.2 * qᵥ_sl)), ρ, T, w, p_air, const_dt, "condensation") ≈ 3.7177455e-5 rtol = 5e-6
-        TT.@test CMNe.conv_q_vap_to_q_liq_ice_MM2015_timeintegrator(liquid, ice, tps, qₚ(FT(1.2 * qᵥ_si)), ρ, T, w, p_air, const_dt, "deposition") ≈ 3.2125972e-5 rtol = 1e-6
+        TT.@test CMNe.conv_q_vap_to_q_liq_ice_MM2015_timeintegrator(liquid, ice, tps, qₚ(FT(1.2 * qᵥ_sl)), ρ, T, w, p_air, const_dt, Val(:condensation)) ≈ 3.7177455e-5 rtol = 5e-6
+        TT.@test CMNe.conv_q_vap_to_q_liq_ice_MM2015_timeintegrator(liquid, ice, tps, qₚ(FT(1.2 * qᵥ_si)), ρ, T, w, p_air, const_dt, Val(:deposition)) ≈ 3.2125972e-5 rtol = 1e-6
 
         # ice grows faster than liquid
-        TT.@test CMNe.conv_q_vap_to_q_liq_ice_MM2015_timeintegrator(liquid, ice, tps, qₚ(FT(1.2 * qᵥ_sl)), ρ, T, w, p_air, const_dt, "condensation") <
-                 CMNe.conv_q_vap_to_q_liq_ice_MM2015_timeintegrator(liquid, ice, tps, qₚ(FT(1.2 * qᵥ_sl)), ρ, T, w, p_air, const_dt, "deposition")
+        TT.@test CMNe.conv_q_vap_to_q_liq_ice_MM2015_timeintegrator(liquid, ice, tps, qₚ(FT(1.2 * qᵥ_sl)), ρ, T, w, p_air, const_dt, Val(:condensation)) <
+                 CMNe.conv_q_vap_to_q_liq_ice_MM2015_timeintegrator(liquid, ice, tps, qₚ(FT(1.2 * qᵥ_sl)), ρ, T, w, p_air, const_dt, Val(:deposition))
 
         #! format: on
     end