diff --git a/compiler/rustc_middle/src/query/inner.rs b/compiler/rustc_middle/src/query/inner.rs
index 7395c5476dc1e..c2525d26d4c67 100644
--- a/compiler/rustc_middle/src/query/inner.rs
+++ b/compiler/rustc_middle/src/query/inner.rs
@@ -6,8 +6,7 @@ use rustc_span::{DUMMY_SP, ErrorGuaranteed, Span};
 use crate::dep_graph;
 use crate::dep_graph::DepNodeKey;
 use crate::query::erase::{self, Erasable, Erased};
-use crate::query::plumbing::QueryVTable;
-use crate::query::{EnsureMode, QueryCache, QueryMode};
+use crate::query::{EnsureMode, QueryCache, QueryMode, QueryVTable};
 use crate::ty::TyCtxt;
 
 /// Checks whether there is already a value for this key in the in-memory
diff --git a/compiler/rustc_middle/src/query/job.rs b/compiler/rustc_middle/src/query/job.rs
index 574a671fd640f..3bf37a782ee8a 100644
--- a/compiler/rustc_middle/src/query/job.rs
+++ b/compiler/rustc_middle/src/query/job.rs
@@ -6,7 +6,7 @@ use std::sync::Arc;
 use parking_lot::{Condvar, Mutex};
 use rustc_span::Span;
 
-use crate::query::plumbing::CycleError;
+use crate::query::CycleError;
 use crate::ty::TyCtxt;
 
 /// A value uniquely identifying an active query job.
diff --git a/compiler/rustc_middle/src/query/mod.rs b/compiler/rustc_middle/src/query/mod.rs
index 517999baba1ec..1723a853ea750 100644
--- a/compiler/rustc_middle/src/query/mod.rs
+++ b/compiler/rustc_middle/src/query/mod.rs
@@ -4,8 +4,8 @@ pub use self::caches::{DefIdCache, DefaultCache, QueryCache, SingleCache, VecCac
 pub use self::job::{QueryJob, QueryJobId, QueryLatch, QueryWaiter};
 pub use self::keys::{AsLocalQueryKey, LocalCrate, QueryKey};
 pub use self::plumbing::{
-    ActiveKeyStatus, CycleError, EnsureMode, IntoQueryParam, QueryMode, QueryState, TyCtxtAt,
-    TyCtxtEnsureDone, TyCtxtEnsureOk, TyCtxtEnsureResult,
+    ActiveKeyStatus, CycleError, EnsureMode, IntoQueryParam, QueryMode, QueryState, QuerySystem,
+    QueryVTable, TyCtxtAt, TyCtxtEnsureDone, TyCtxtEnsureOk, TyCtxtEnsureResult,
 };
 pub use self::stack::QueryStackFrame;
 pub use crate::queries::Providers;
@@ -19,7 +19,7 @@ mod job;
 mod keys;
 pub(crate) mod modifiers;
 pub mod on_disk_cache;
-pub mod plumbing;
+pub(crate) mod plumbing;
 mod stack;
 
 pub fn describe_as_module(def_id: impl Into<LocalDefId>, tcx: TyCtxt<'_>) -> String {
diff --git a/compiler/rustc_middle/src/query/plumbing.rs b/compiler/rustc_middle/src/query/plumbing.rs
index 6f18c01577da2..e88c20f02537b 100644
--- a/compiler/rustc_middle/src/query/plumbing.rs
+++ b/compiler/rustc_middle/src/query/plumbing.rs
@@ -569,7 +569,7 @@ macro_rules! define_callbacks {
         /// Holds a `QueryVTable` for each query.
         pub struct QueryVTables<'tcx> {
             $(
-                pub $name: ::rustc_middle::query::plumbing::QueryVTable<'tcx, $name::Cache<'tcx>>,
+                pub $name: crate::query::QueryVTable<'tcx, $name::Cache<'tcx>>,
             )*
         }
 
diff --git a/compiler/rustc_middle/src/ty/context.rs b/compiler/rustc_middle/src/ty/context.rs
index 91105f416c8f8..074ce6c246a64 100644
--- a/compiler/rustc_middle/src/ty/context.rs
+++ b/compiler/rustc_middle/src/ty/context.rs
@@ -61,8 +61,7 @@ use crate::middle::codegen_fn_attrs::{CodegenFnAttrs, TargetFeature};
 use crate::middle::resolve_bound_vars;
 use crate::mir::interpret::{self, Allocation, ConstAllocation};
 use crate::mir::{Body, Local, Place, PlaceElem, ProjectionKind, Promoted};
-use crate::query::plumbing::QuerySystem;
-use crate::query::{IntoQueryParam, LocalCrate, Providers, TyCtxtAt};
+use crate::query::{IntoQueryParam, LocalCrate, Providers, QuerySystem, TyCtxtAt};
 use crate::thir::Thir;
 use crate::traits;
 use crate::traits::solve::{ExternalConstraints, ExternalConstraintsData, PredefinedOpaques};
diff --git a/compiler/rustc_query_impl/src/execution.rs b/compiler/rustc_query_impl/src/execution.rs
index eae91a2b2e566..10c47fd73de11 100644
--- a/compiler/rustc_query_impl/src/execution.rs
+++ b/compiler/rustc_query_impl/src/execution.rs
@@ -7,10 +7,9 @@ use rustc_data_structures::sync::{DynSend, DynSync};
 use rustc_data_structures::{outline, sharded, sync};
 use rustc_errors::FatalError;
 use rustc_middle::dep_graph::{DepGraphData, DepNodeKey, SerializedDepNodeIndex};
-use rustc_middle::query::plumbing::QueryVTable;
 use rustc_middle::query::{
     ActiveKeyStatus, CycleError, EnsureMode, QueryCache, QueryJob, QueryJobId, QueryKey,
-    QueryLatch, QueryMode, QueryState,
+    QueryLatch, QueryMode, QueryState, QueryVTable,
 };
 use rustc_middle::ty::TyCtxt;
 use rustc_middle::verify_ich::incremental_verify_ich;
diff --git a/compiler/rustc_query_impl/src/lib.rs b/compiler/rustc_query_impl/src/lib.rs
index c62ea3e289fcb..27b0a253145f4 100644
--- a/compiler/rustc_query_impl/src/lib.rs
+++ b/compiler/rustc_query_impl/src/lib.rs
@@ -11,9 +11,8 @@
 use rustc_data_structures::sync::AtomicU64;
 use rustc_middle::dep_graph;
 use rustc_middle::queries::{ExternProviders, Providers};
-use rustc_middle::query::QueryCache;
 use rustc_middle::query::on_disk_cache::OnDiskCache;
-use rustc_middle::query::plumbing::{QuerySystem, QueryVTable};
+use rustc_middle::query::{QueryCache, QuerySystem, QueryVTable};
 use rustc_middle::ty::TyCtxt;
 
 pub use crate::dep_kind_vtables::make_dep_kind_vtables;
diff --git a/compiler/rustc_query_impl/src/plumbing.rs b/compiler/rustc_query_impl/src/plumbing.rs
index c9cd08648b1b1..21910068a1385 100644
--- a/compiler/rustc_query_impl/src/plumbing.rs
+++ b/compiler/rustc_query_impl/src/plumbing.rs
@@ -13,8 +13,9 @@ use rustc_middle::query::erase::{Erasable, Erased};
 use rustc_middle::query::on_disk_cache::{
     AbsoluteBytePos, CacheDecoder, CacheEncoder, EncodedDepNodeIndex,
 };
-use rustc_middle::query::plumbing::QueryVTable;
-use rustc_middle::query::{QueryCache, QueryJobId, QueryKey, QueryMode, QueryStackFrame, erase};
+use rustc_middle::query::{
+    QueryCache, QueryJobId, QueryKey, QueryMode, QueryStackFrame, QueryVTable, erase,
+};
 use rustc_middle::ty::TyCtxt;
 use rustc_middle::ty::codec::TyEncoder;
 use rustc_middle::ty::tls::{self, ImplicitCtxt};
diff --git a/compiler/rustc_query_impl/src/profiling_support.rs b/compiler/rustc_query_impl/src/profiling_support.rs
index c34938cdb3866..53577e0a9bd1d 100644
--- a/compiler/rustc_query_impl/src/profiling_support.rs
+++ b/compiler/rustc_query_impl/src/profiling_support.rs
@@ -6,8 +6,7 @@ use rustc_data_structures::fx::FxHashMap;
 use rustc_data_structures::profiling::SelfProfiler;
 use rustc_hir::def_id::{CrateNum, DefId, DefIndex, LOCAL_CRATE, LocalDefId};
 use rustc_hir::definitions::DefPathData;
-use rustc_middle::query::QueryCache;
-use rustc_middle::query::plumbing::QueryVTable;
+use rustc_middle::query::{QueryCache, QueryVTable};
 use rustc_middle::ty::TyCtxt;
 
 use crate::query_impl::for_each_query_vtable;
diff --git a/compiler/rustc_query_impl/src/query_impl.rs b/compiler/rustc_query_impl/src/query_impl.rs
index 23f678e1c9f73..caf4c7dde7e67 100644
--- a/compiler/rustc_query_impl/src/query_impl.rs
+++ b/compiler/rustc_query_impl/src/query_impl.rs
@@ -1,7 +1,6 @@
 use rustc_middle::queries::TaggedQueryKey;
 use rustc_middle::query::erase::{self, Erased};
-use rustc_middle::query::plumbing::QueryVTable;
-use rustc_middle::query::{AsLocalQueryKey, QueryMode};
+use rustc_middle::query::{AsLocalQueryKey, QueryMode, QueryVTable};
 use rustc_middle::ty::TyCtxt;
 use rustc_span::Span;
 
@@ -245,7 +244,7 @@ macro_rules! define_queries {
             (ALL, $tcx:expr, $closure:expr) => {{
                 let tcx: rustc_middle::ty::TyCtxt<'_> = $tcx;
                 $(
-                    let query: &rustc_middle::query::plumbing::QueryVTable<'_, _> =
+                    let query: &rustc_middle::query::QueryVTable<'_, _> =
                         &tcx.query_system.query_vtables.$name;
                     $closure(query);
                 )*
@@ -260,7 +259,7 @@ macro_rules! define_queries {
                 $(
                     #[cfg($cache_on_disk)]
                     {
-                        let query: &rustc_middle::query::plumbing::QueryVTable<'_, _> =
+                        let query: &rustc_middle::query::QueryVTable<'_, _> =
                             &tcx.query_system.query_vtables.$name;
                         $closure(query);
                     }