diff --git a/test/regression/solvers/delta_eddington.F90 b/test/regression/solvers/delta_eddington.F90
index 3befdaad..41112163 100644
--- a/test/regression/solvers/delta_eddington.F90
+++ b/test/regression/solvers/delta_eddington.F90
@@ -91,8 +91,8 @@ subroutine test_cpp_delta_eddington_solver_t(config_file_path)
     earth_sun_distance => core%get_profile( "Earth-Sun distance", "AU" )
 
     ! Run the solver for each set of conditions
-    allocate( f90_radiation_fields( columns%ncells_ ) )
-    do i_column = 1, columns%ncells_
+    allocate( f90_radiation_fields( columns%ncells_ + 1 ) )
+    do i_column = 1, columns%ncells_ + 1
       call core%run( solar_zenith_angle%edge_val_( i_column ),                &
                      earth_sun_distance%edge_val_( i_column ) )
 
diff --git a/test/regression/solvers/delta_eddington.cpp b/test/regression/solvers/delta_eddington.cpp
index 30e42882..e1946c3c 100644
--- a/test/regression/solvers/delta_eddington.cpp
+++ b/test/regression/solvers/delta_eddington.cpp
@@ -58,13 +58,25 @@ void CheckInputs(const std::vector<double>& solar_zenith_angles,
                  const std::map<std::string, tuvx::Profile<tuvx::Array2D<double>>>& profiles,
                  const tuvx::RadiatorState<tuvx::Array3D<double>>& accumulated_radiator_states)
 {
+  // Solar zenith angles have been converted to radians from degrees
   ASSERT(solar_zenith_angles.size() == 2);
+  ASSERT(solar_zenith_angles.at(0) > 1.8294 * 3.14159265 / 180.0);
+  ASSERT(solar_zenith_angles.at(0) < 1.8295 * 3.14159265 / 180.0);
+  ASSERT(solar_zenith_angles.at(1) > 28.199 * 3.14159265 / 180.0);
+  ASSERT(solar_zenith_angles.at(1) < 28.200 * 3.14159265 / 180.0);
+
+  // Earth-Sun distances are in AU
   ASSERT(earth_sun_distances.size() == 2);
+  ASSERT(earth_sun_distances.at(0) > 0.9961);
+  ASSERT(earth_sun_distances.at(0) < 0.9962);
+  ASSERT(earth_sun_distances.at(1) > 0.9962);
+  ASSERT(earth_sun_distances.at(1) < 0.9963);
+
+  // heights have been converted to meters from km
   ASSERT(grids.size() == 2);
   ASSERT(grids.at("altitude [m]").NumberOfColumns() == 2);
   ASSERT(grids.at("altitude [m]").NumberOfSections() == 120);
   ASSERT(!grids.at("altitude [m]").IsConstant());
-  // heights have been converted to meters from km
   ASSERT(grids.at("altitude [m]").edges_(0,0) == 0.0); 
   ASSERT(grids.at("altitude [m]").edges_(42,0) == 42000.0);
   ASSERT(grids.at("altitude [m]").edges_(120,0) == 120000.0); 
@@ -77,10 +89,11 @@ void CheckInputs(const std::vector<double>& solar_zenith_angles,
   ASSERT(grids.at("altitude [m]").mid_points_(0,1) == 500.0);
   ASSERT(grids.at("altitude [m]").mid_points_(41,1) == 41500.0);
   ASSERT(grids.at("altitude [m]").mid_points_(119,1) == 119500.0);
+
+  // wavelengths have been converted to meters from nm
   ASSERT(grids.at("wavelength [m]").NumberOfColumns() == 1);
   ASSERT(grids.at("wavelength [m]").NumberOfSections() == 156);
   ASSERT(grids.at("wavelength [m]").IsConstant());
-  // wavelengths have been converted to meters from nm
   ASSERT(grids.at("wavelength [m]").edges_(0,0) == 120.0*1.0e-9);
   ASSERT(grids.at("wavelength [m]").edges_(77,0) == 311.5*1.0e-9);
   ASSERT(grids.at("wavelength [m]").edges_(156,0) == 735.0*1.0e-9);