diff --git a/dpctl/_init_helper.py b/dpctl/_init_helper.py
index db3ca3f7c8..e3903c7156 100644
--- a/dpctl/_init_helper.py
+++ b/dpctl/_init_helper.py
@@ -24,7 +24,7 @@
     and os.path.isfile(os.path.join(sys.exec_prefix, "pyvenv.cfg"))
 )
 
-if is_venv_win32:
+if is_venv_win32:  # pragma: no cover
     # For virtual environments on Windows, add folder
     # with DPC++ libraries to the DLL search path gh-1745
     dll_dir = os.path.join(sys.exec_prefix, "Library", "bin")
diff --git a/dpctl/tensor/_numpy_helper.py b/dpctl/tensor/_numpy_helper.py
index 5f369b5d0d..1325faa3bf 100644
--- a/dpctl/tensor/_numpy_helper.py
+++ b/dpctl/tensor/_numpy_helper.py
@@ -18,14 +18,14 @@
 
 _npver = np.lib.NumpyVersion(np.__version__)
 
-if _npver < "1.25.0":
+if _npver < "1.25.0":  # pragma: no cover
     from numpy import AxisError
 else:
     from numpy.exceptions import AxisError
 
 if _npver >= "2.0.0":
     from numpy._core.numeric import normalize_axis_index, normalize_axis_tuple
-else:
+else:  # pragma: no cover
     from numpy.core.numeric import normalize_axis_index, normalize_axis_tuple
 
 
diff --git a/dpctl/tensor/_types.pxi b/dpctl/tensor/_types.pxi
index f2d26cb16c..df47fa28dc 100644
--- a/dpctl/tensor/_types.pxi
+++ b/dpctl/tensor/_types.pxi
@@ -14,27 +14,25 @@
 #  See the License for the specific language governing permissions and
 #  limitations under the License.
 
-import numpy as np
-
-
 # these typenum values are aligned to values in NumPy
-cdef int UAR_BOOL = 0
-cdef int UAR_BYTE = 1
-cdef int UAR_UBYTE = 2
-cdef int UAR_SHORT = 3
-cdef int UAR_USHORT = 4
-cdef int UAR_INT = 5
-cdef int UAR_UINT = 6
-cdef int UAR_LONG = 7
-cdef int UAR_ULONG = 8
-cdef int UAR_LONGLONG = 9
-cdef int UAR_ULONGLONG = 10
-cdef int UAR_FLOAT = 11
-cdef int UAR_DOUBLE = 12
-cdef int UAR_CFLOAT = 14
-cdef int UAR_CDOUBLE = 15
-cdef int UAR_TYPE_SENTINEL = 17
-cdef int UAR_HALF = 23
+cdef:
+    int UAR_BOOL = 0     # pragma: no cover
+    int UAR_BYTE = 1     # pragma: no cover
+    int UAR_UBYTE = 2    # pragma: no cover
+    int UAR_SHORT = 3    # pragma: no cover
+    int UAR_USHORT = 4   # pragma: no cover
+    int UAR_INT = 5      # pragma: no cover
+    int UAR_UINT = 6     # pragma: no cover
+    int UAR_LONG = 7     # pragma: no cover
+    int UAR_ULONG = 8    # pragma: no cover
+    int UAR_LONGLONG = 9 # pragma: no cover
+    int UAR_ULONGLONG = 10 # pragma: no cover
+    int UAR_FLOAT = 11   # pragma: no cover
+    int UAR_DOUBLE = 12  # pragma: no cover
+    int UAR_CFLOAT = 14  # pragma: no cover
+    int UAR_CDOUBLE = 15 # pragma: no cover
+    int UAR_TYPE_SENTINEL = 17 # pragma: no cover
+    int UAR_HALF = 23    # pragma: no cover
 
 cdef int type_bytesize(int typenum):
     """
@@ -74,7 +72,7 @@ cdef int type_bytesize(int typenum):
         sizeof(float complex),
         sizeof(double complex), -1]
 
-    if typenum < 0:
+    if typenum < 0: # pragma: no cover
         return -1
     if typenum > 16:
         if typenum == 23:
@@ -92,12 +90,12 @@ cdef str _make_typestr(int typenum):
                         "|i", "|u", "|i", "|u", "|i", "|u",
                         "|f", "|f", "", "|c", "|c", ""]
 
-    if (typenum < 0):
+    if (typenum < 0): # pragma: no cover
         return ""
     if (typenum > 16):
         if (typenum == 23):
             return "|f2"
-        return ""
+        return ""  # pragma: no cover
 
     return type_to_str[typenum] + str(type_bytesize(typenum))
 
@@ -126,10 +124,10 @@ cdef int descr_to_typenum(object dtype):
     if (not isinstance(obj, list) or len(obj) != 1):
         return -1    # token for ValueError
     obj = obj[0]
-    if (not isinstance(obj, tuple) or len(obj) != 2 or obj[0]):
+    if (not isinstance(obj, tuple) or len(obj) != 2 or obj[0]): # pragma: no cover
         return -1
     obj = obj[1]
-    if not isinstance(obj, str):
+    if not isinstance(obj, str): # pragma: no cover
         return -1
     return typenum_from_format(obj)
 
@@ -146,9 +144,9 @@ cdef int dtype_to_typenum(dtype):
             dt = np.dtype(dtype)
         except TypeError:
             return -3
-        except Exception:
+        except Exception: # pragma: no cover
             return -1
         if hasattr(dt, 'descr'):
             return descr_to_typenum(dt)
-        else:
+        else:          # pragma: no cover
             return -3  # token for TypeError
diff --git a/dpctl/tests/test_utils.py b/dpctl/tests/test_utils.py
index 633438b9e0..fac9f41a7b 100644
--- a/dpctl/tests/test_utils.py
+++ b/dpctl/tests/test_utils.py
@@ -151,6 +151,12 @@ def test_intel_device_info():
         assert test, err_msg
 
 
+def test_intel_device_info_validation():
+    invalid_device = dict()
+    with pytest.raises(TypeError):
+        dpctl.utils.intel_device_info(invalid_device)
+
+
 def test_order_manager():
     try:
         q = dpctl.SyclQueue()
diff --git a/dpctl/utils/_intel_device_info.py b/dpctl/utils/_intel_device_info.py
index fd59623dd9..f4de00a8f4 100644
--- a/dpctl/utils/_intel_device_info.py
+++ b/dpctl/utils/_intel_device_info.py
@@ -69,11 +69,11 @@ def intel_device_info(dev, /):
     if not isinstance(dev, SyclDevice):
         raise TypeError(f"Expected dpctl.SyclDevice, got {type(dev)}")
     dev_id = intel_device_info_device_id(dev)
-    if dev_id:
+    if dev_id:  # pragma: no cover
         res = {
             "device_id": dev_id,
         }
-        if dev.has_aspect_gpu:
+        if dev.has_aspect_gpu:  # pragma: no cover
             eu_count = intel_device_info_gpu_eu_count(dev)
             if eu_count:
                 res["gpu_eu_count"] = eu_count