diff --git a/.github/workflows/sqlx.yml b/.github/workflows/sqlx.yml
index 05d5da0a3b..6ca92f0e20 100644
--- a/.github/workflows/sqlx.yml
+++ b/.github/workflows/sqlx.yml
@@ -243,7 +243,7 @@ jobs:
         env:
           DATABASE_URL: postgres://postgres:password@localhost:5432/sqlx
           SQLX_OFFLINE_DIR: .sqlx
-          RUSTFLAGS: --cfg postgres="${{ matrix.postgres }}"
+          RUSTFLAGS: -D warnings --cfg postgres="${{ matrix.postgres }}"
 
       # Run the `test-attr` test again to cover cleanup.
       - run: >
@@ -254,7 +254,7 @@ jobs:
         env:
           DATABASE_URL: postgres://postgres:password@localhost:5432/sqlx
           SQLX_OFFLINE_DIR: .sqlx
-          RUSTFLAGS: --cfg postgres="${{ matrix.postgres }}"
+          RUSTFLAGS: -D warnings --cfg postgres="${{ matrix.postgres }}"
 
       - if: matrix.tls != 'none'
         run: >
@@ -264,7 +264,7 @@ jobs:
         env:
           DATABASE_URL: postgres://postgres:password@localhost:5432/sqlx?sslmode=verify-ca&sslrootcert=.%2Ftests%2Fcerts%2Fca.crt
           SQLX_OFFLINE_DIR: .sqlx
-          RUSTFLAGS: --cfg postgres="${{ matrix.postgres }}"
+          RUSTFLAGS: -D warnings --cfg postgres="${{ matrix.postgres }}"
 
       # Remove test artifacts
       - run: cargo clean -p sqlx
@@ -290,7 +290,7 @@ jobs:
           DATABASE_URL: postgres://postgres:password@localhost:5432/sqlx
           SQLX_OFFLINE: true
           SQLX_OFFLINE_DIR: .sqlx
-          RUSTFLAGS: --cfg postgres="${{ matrix.postgres }}"
+          RUSTFLAGS: -D warnings --cfg postgres="${{ matrix.postgres }}"
 
   postgres-ssl-auth:
     name: Postgres SSL Auth
@@ -322,7 +322,7 @@ jobs:
           --features any,postgres,macros,_unstable-all-types,runtime-${{ matrix.runtime }},tls-${{ matrix.tls }}
         env:
           DATABASE_URL: postgres://postgres@localhost:5432/sqlx?sslmode=verify-ca&sslrootcert=.%2Ftests%2Fcerts%2Fca.crt&sslkey=.%2Ftests%2Fcerts%2Fkeys%2Fclient.key&sslcert=.%2Ftests%2Fcerts%2Fclient.crt
-          RUSTFLAGS: --cfg postgres="${{ matrix.postgres }}"
+          RUSTFLAGS: -D warnings --cfg postgres="${{ matrix.postgres }}"
 
   mysql:
     name: MySQL
diff --git a/tests/postgres/types.rs b/tests/postgres/types.rs
index 420e9732f3..c923422e53 100644
--- a/tests/postgres/types.rs
+++ b/tests/postgres/types.rs
@@ -330,7 +330,15 @@ mod chrono {
 
     test_type!(chrono_date_time_tz<DateTime::<FixedOffset>>(Postgres,
         "TIMESTAMPTZ '2019-01-02 05:10:20.115100+06:30'"
-            == FixedOffset::east_opt(60 * 60 * 6 + 1800).unwrap().ymd(2019, 1, 2).and_hms_micro_opt(5, 10, 20, 115100).unwrap()
+            == FixedOffset::east_opt(60 * 60 * 6 + 1800)
+                .unwrap()
+                .from_local_datetime(
+                    &NaiveDate::from_ymd_opt(2019, 1, 2)
+                        .unwrap()
+                        .and_hms_micro_opt(5, 10, 20, 115_100)
+                        .unwrap()
+                )
+                .unwrap()
     ));
 
     test_type!(chrono_date_time_tz_vec<Vec<DateTime::<Utc>>>(Postgres,