diff --git a/transformations/tests/test_single_column_coalesced.py b/transformations/tests/test_single_column_coalesced.py
index 7a2def8ca..c431a3805 100644
--- a/transformations/tests/test_single_column_coalesced.py
+++ b/transformations/tests/test_single_column_coalesced.py
@@ -706,9 +706,16 @@ def test_single_column_coalesced_hoist_openacc(frontend, horizontal, vertical, b
     when hoisting array temporaries to driver.
     """
 
+    fcode_mod = """
+  MODULE BLOCK_DIM_MOD
+     INTEGER :: nb
+  END MODULE BLOCK_DIM_MOD
+  """
+
     fcode_driver = """
-  SUBROUTINE column_driver(nlon, nz, q, nb)
-    INTEGER, INTENT(IN)   :: nlon, nz, nb  ! Size of the horizontal and vertical
+  SUBROUTINE column_driver(nlon, nz, q)
+    USE BLOCK_DIM_MOD, ONLY : nb
+    INTEGER, INTENT(IN)   :: nlon, nz  ! Size of the horizontal and vertical
     REAL, INTENT(INOUT)   :: q(nlon,nz,nb)
     INTEGER :: b, start, end
 
@@ -760,8 +767,9 @@ def test_single_column_coalesced_hoist_openacc(frontend, horizontal, vertical, b
 """.strip()
 
     # Mimic the scheduler internal mechanis to apply the transformation cascade
+    mod_source = Sourcefile.from_source(fcode_mod, frontend=frontend)
     kernel_source = Sourcefile.from_source(fcode_kernel, frontend=frontend)
-    driver_source = Sourcefile.from_source(fcode_driver, frontend=frontend)
+    driver_source = Sourcefile.from_source(fcode_driver, frontend=frontend, definitions=mod_source.modules)
     module_source = Sourcefile.from_source(fcode_module, frontend=frontend)
     driver = driver_source['column_driver']
     kernel = kernel_source['compute_column']
@@ -784,6 +792,9 @@ def test_single_column_coalesced_hoist_openacc(frontend, horizontal, vertical, b
         driver, role='driver', item=driver_item, successors=(kernel_item,), targets=['compute_column']
     )
 
+    # Check that blocking size has not been redefined
+    assert driver.symbol_map[blocking.size].type.module.name.lower() == 'block_dim_mod'
+
     with pragmas_attached(kernel, Loop):
         # Ensure kernel routine is anntoated at vector level
         kernel_pragmas = FindNodes(Pragma).visit(kernel.ir)
diff --git a/transformations/transformations/single_column_base.py b/transformations/transformations/single_column_base.py
index 3dbe50a90..795d7d1f4 100644
--- a/transformations/transformations/single_column_base.py
+++ b/transformations/transformations/single_column_base.py
@@ -110,9 +110,7 @@ def get_integer_variable(cls, routine, name):
         name : string
             Name of the variable to find the in the routine.
         """
-        if name in routine.variable_map:
-            v_index = routine.variable_map[name]
-        else:
+        if not (v_index := routine.symbol_map.get(name, None)):
             dtype = SymbolAttributes(BasicType.INTEGER)
             v_index = sym.Variable(name=name, type=dtype, scope=routine)
         return v_index