diff --git a/datafusion/physical-plan/src/joins/hash_join.rs b/datafusion/physical-plan/src/joins/hash_join.rs
index 4ed4d9ba2534f..063f35059fb8f 100644
--- a/datafusion/physical-plan/src/joins/hash_join.rs
+++ b/datafusion/physical-plan/src/joins/hash_join.rs
@@ -1932,6 +1932,7 @@ mod tests {
     }
 
     // FIXME(#TODO) test fails with feature `force_hash_collisions`
+    // https://github.com/apache/datafusion/issues/11658
     #[cfg(not(feature = "force_hash_collisions"))]
     #[apply(batch_sizes)]
     #[tokio::test]
@@ -1989,6 +1990,7 @@ mod tests {
 
     /// Test where the left has 2 parts, the right with 1 part => 1 part
     // FIXME(#TODO) test fails with feature `force_hash_collisions`
+    // https://github.com/apache/datafusion/issues/11658
     #[cfg(not(feature = "force_hash_collisions"))]
     #[apply(batch_sizes)]
     #[tokio::test]
@@ -2103,6 +2105,7 @@ mod tests {
 
     /// Test where the left has 1 part, the right has 2 parts => 2 parts
     // FIXME(#TODO) test fails with feature `force_hash_collisions`
+    // https://github.com/apache/datafusion/issues/11658
     #[cfg(not(feature = "force_hash_collisions"))]
     #[apply(batch_sizes)]
     #[tokio::test]
diff --git a/datafusion/sqllogictest/test_files/parquet.slt b/datafusion/sqllogictest/test_files/parquet.slt
index 553cdeee908cc..3342f85c81417 100644
--- a/datafusion/sqllogictest/test_files/parquet.slt
+++ b/datafusion/sqllogictest/test_files/parquet.slt
@@ -252,6 +252,7 @@ SELECT COUNT(*) FROM timestamp_with_tz;
 131072
 
 # FIXME(#TODO) fails with feature `force_hash_collisions`
+# https://github.com/apache/datafusion/issues/11660
 # Perform the query:
 # query IPT
 # SELECT
diff --git a/datafusion/sqllogictest/test_files/sort_merge_join.slt b/datafusion/sqllogictest/test_files/sort_merge_join.slt
index bebec31b90c09..6e7b50973cde2 100644
--- a/datafusion/sqllogictest/test_files/sort_merge_join.slt
+++ b/datafusion/sqllogictest/test_files/sort_merge_join.slt
@@ -239,6 +239,7 @@ SELECT * FROM t1 FULL JOIN t2 ON t1_id = t2_id
 NULL NULL NULL 55 w 3
 
 # FIXME(#TODO) fails with feature `force_hash_collisions`
+# https://github.com/apache/datafusion/issues/11659
 # equijoin_full_and_condition_from_both
 # query ITIITI rowsort
 # SELECT * FROM t1 FULL JOIN t2 ON t1_id = t2_id AND t2_int <= t1_int
diff --git a/rust-toolchain.toml b/rust-toolchain.toml
deleted file mode 100644
index 0ef859ae8db3b..0000000000000
--- a/rust-toolchain.toml
+++ /dev/null
@@ -1,20 +0,0 @@
-# Licensed to the Apache Software Foundation (ASF) under one
-# or more contributor license agreements.  See the NOTICE file
-# distributed with this work for additional information
-# regarding copyright ownership.  The ASF licenses this file
-# to you under the Apache License, Version 2.0 (the
-# "License"); you may not use this file except in compliance
-# with the License.  You may obtain a copy of the License at
-#
-#   http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing,
-# software distributed under the License is distributed on an
-# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
-# KIND, either express or implied.  See the License for the
-# specific language governing permissions and limitations
-# under the License.
-
-[toolchain]
-# Temporarily pin toolchain version until we solve problems reported by newer clippy release.
-channel = "1.79.0"
\ No newline at end of file