diff --git a/sycl/source/detail/program_impl.cpp b/sycl/source/detail/program_impl.cpp
index ca5628fb1a8d6..ed78ecb440ef7 100644
--- a/sycl/source/detail/program_impl.cpp
+++ b/sycl/source/detail/program_impl.cpp
@@ -259,7 +259,7 @@ void program_impl::link(std::string LinkOptions) {
 }
 
 bool program_impl::has_kernel(std::string KernelName,
-                              bool IsCreatedFromSource) const {
+                              bool /*IsCreatedFromSource*/) const {
   throw_if_state_is(program_state::none);
 
   std::vector<sycl::detail::pi::PiDevice> Devices(get_pi_devices());
diff --git a/sycl/source/detail/sycl_mem_obj_t.cpp b/sycl/source/detail/sycl_mem_obj_t.cpp
index 68207bec67d53..009f910be440c 100644
--- a/sycl/source/detail/sycl_mem_obj_t.cpp
+++ b/sycl/source/detail/sycl_mem_obj_t.cpp
@@ -173,7 +173,7 @@ size_t SYCLMemObjT::getBufSizeForContext(const ContextImplPtr &Context,
 
 bool SYCLMemObjT::isInterop() const { return MOpenCLInterop; }
 
-void SYCLMemObjT::determineHostPtr(const ContextImplPtr &Context,
+void SYCLMemObjT::determineHostPtr(const ContextImplPtr & /*Context*/,
                                    bool InitFromUserData, void *&HostPtr,
                                    bool &HostPtrReadOnly) {
   // The data for the allocation can be provided via either the user pointer
diff --git a/sycl/unittests/scheduler/StreamInitDependencyOnHost.cpp b/sycl/unittests/scheduler/StreamInitDependencyOnHost.cpp
index 91f2ff53cdc2f..af11192c31851 100644
--- a/sycl/unittests/scheduler/StreamInitDependencyOnHost.cpp
+++ b/sycl/unittests/scheduler/StreamInitDependencyOnHost.cpp
@@ -47,31 +47,3 @@ class MockHandlerStreamInit : public MockHandler {
     return CommandGroup;
   }
 };
-
-using CmdTypeTy = sycl::detail::Command::CommandType;
-
-// Function recursively checks that initial command has dependency on chain of
-// other commands that should have type DepCmdsTypes[Depth] (Depth is a distance
-// - 1 in a command dependencies tree from initial command to a currently
-// checked one) and requirement on memory object of stream's flush buffer.
-static bool ValidateDepCommandsTree(const detail::Command *Cmd,
-                                    const std::vector<CmdTypeTy> &DepCmdsTypes,
-                                    const detail::SYCLMemObjI *MemObj,
-                                    size_t Depth = 0) {
-  if (!Cmd || Depth >= DepCmdsTypes.size())
-    throw sycl::runtime_error("Command parameters are invalid",
-                              PI_ERROR_INVALID_VALUE);
-
-  for (const detail::DepDesc &Dep : Cmd->MDeps) {
-    if (Dep.MDepCommand &&
-        (Dep.MDepCommand->getType() == DepCmdsTypes[Depth]) &&
-        Dep.MDepRequirement && (Dep.MDepRequirement->MSYCLMemObj == MemObj) &&
-        ((Depth == DepCmdsTypes.size() - 1) ||
-         ValidateDepCommandsTree(Dep.MDepCommand, DepCmdsTypes, MemObj,
-                                 Depth + 1))) {
-      return true;
-    }
-  }
-
-  return false;
-}