diff --git a/.github/workflows/windows-postgres-cxx20.yaml b/.github/workflows/windows-postgres-cxx20.yaml
new file mode 100644
index 0000000..25a41b1
--- /dev/null
+++ b/.github/workflows/windows-postgres-cxx20.yaml
@@ -0,0 +1,36 @@
+name: windows-postgres-cxx20 
+
+on:
+  pull_request:
+    types: [opened, synchronize, reopened, closed]
+  push:
+    branches:
+      - master
+
+env: 
+    VCPKG_BINARY_SOURCES: "clear;x-gha,readwrite"
+
+jobs:
+  windows-msvc:
+    runs-on: windows-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+        with:
+          submodules: recursive
+          fetch-depth: 0
+      - name: Export GitHub Actions cache environment variables
+        uses: actions/github-script@v7
+        with:
+          script: |
+            core.exportVariable('ACTIONS_CACHE_URL', process.env.ACTIONS_CACHE_URL || '');
+            core.exportVariable('ACTIONS_RUNTIME_TOKEN', process.env.ACTIONS_RUNTIME_TOKEN || '');
+      - uses: ilammy/msvc-dev-cmd@v1
+      - uses: lukka/run-vcpkg@v11
+      - name: Compile
+        run: |
+          cmake -S . -B build -G Ninja -DCMAKE_CXX_STANDARD=20 -DSQLGEN_BUILD_TESTS=ON -DSQLGEN_SQLITE3=OFF -DSQLGEN_BUILD_DRY_TESTS_ONLY=ON 
+          cmake --build build --config Release -j4 
+      - name: Run tests
+        run: |
+          ctest --test-dir build --output-on-failure
diff --git a/.github/workflows/windows-sqlite-cxx20.yaml b/.github/workflows/windows-sqlite-cxx20.yaml
new file mode 100644
index 0000000..90fda0d
--- /dev/null
+++ b/.github/workflows/windows-sqlite-cxx20.yaml
@@ -0,0 +1,36 @@
+name: windows-sqlite-cxx20 
+
+on:
+  pull_request:
+    types: [opened, synchronize, reopened, closed]
+  push:
+    branches:
+      - master
+
+env: 
+    VCPKG_BINARY_SOURCES: "clear;x-gha,readwrite"
+
+jobs:
+  windows-msvc:
+    runs-on: windows-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+        with:
+          submodules: recursive
+          fetch-depth: 0
+      - name: Export GitHub Actions cache environment variables
+        uses: actions/github-script@v7
+        with:
+          script: |
+            core.exportVariable('ACTIONS_CACHE_URL', process.env.ACTIONS_CACHE_URL || '');
+            core.exportVariable('ACTIONS_RUNTIME_TOKEN', process.env.ACTIONS_RUNTIME_TOKEN || '');
+      - uses: ilammy/msvc-dev-cmd@v1
+      - uses: lukka/run-vcpkg@v11
+      - name: Compile
+        run: |
+          cmake -S . -B build -G Ninja -DCMAKE_CXX_STANDARD=20 -DSQLGEN_BUILD_TESTS=ON -DSQLGEN_POSTGRES=OFF 
+          cmake --build build --config Release -j4 
+      - name: Run tests
+        run: |
+          ctest --test-dir build --output-on-failure
diff --git a/src/sqlgen/postgres/Connection.cpp b/src/sqlgen/postgres/Connection.cpp
index 7200137..4428d0c 100644
--- a/src/sqlgen/postgres/Connection.cpp
+++ b/src/sqlgen/postgres/Connection.cpp
@@ -76,6 +76,7 @@ Result<Nothing> Connection::insert(
     const auto& d = _data[i];
 
     if (d.size() != current_row.size()) {
+      execute("DEALLOCATE sqlgen_insert_into_table;");
       return error("Error in entry " + std::to_string(i) + ": Expected " +
                    std::to_string(current_row.size()) + " entries, got " +
                    std::to_string(d.size()));
diff --git a/tests/postgres/test_insert_and_read.cpp b/tests/postgres/test_insert_and_read.cpp
index 129064b..380178a 100644
--- a/tests/postgres/test_insert_and_read.cpp
+++ b/tests/postgres/test_insert_and_read.cpp
@@ -1,3 +1,5 @@
+#ifndef SQLGEN_BUILD_DRY_TESTS_ONLY
+
 #include <gtest/gtest.h>
 
 #include <rfl.hpp>
@@ -47,3 +49,5 @@ TEST(postgres, test_insert_and_read) {
 }
 
 }  // namespace test_insert_and_read
+
+#endif
diff --git a/tests/postgres/test_insert_and_read_two_tables.cpp b/tests/postgres/test_insert_and_read_two_tables.cpp
index 9cda938..cc453ce 100644
--- a/tests/postgres/test_insert_and_read_two_tables.cpp
+++ b/tests/postgres/test_insert_and_read_two_tables.cpp
@@ -1,3 +1,5 @@
+#ifndef SQLGEN_BUILD_DRY_TESTS_ONLY
+
 #include <gtest/gtest.h>
 
 #include <rfl.hpp>
@@ -60,3 +62,5 @@ TEST(postgres, test_insert_and_read_two_tables) {
 }
 
 }  // namespace test_insert_and_read_two_tables
+
+#endif
diff --git a/tests/postgres/test_transaction.cpp b/tests/postgres/test_transaction.cpp
index 8e76cc0..8eef514 100644
--- a/tests/postgres/test_transaction.cpp
+++ b/tests/postgres/test_transaction.cpp
@@ -1,3 +1,5 @@
+#ifndef SQLGEN_BUILD_DRY_TESTS_ONLY
+
 #include <gtest/gtest.h>
 
 #include <rfl.hpp>
@@ -6,7 +8,7 @@
 #include <sqlgen/postgres.hpp>
 #include <vector>
 
-namespace test_update {
+namespace test_transaction {
 
 struct Person {
   sqlgen::PrimaryKey<uint32_t> id;
@@ -59,4 +61,6 @@ TEST(postgres, test_transaction) {
   EXPECT_EQ(rfl::json::write(people2), expected);
 }
 
-}  // namespace test_update
+}  // namespace test_transaction
+
+#endif