diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index 3d7988ca..380e5c97 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -6,11 +6,13 @@ on:
 
 jobs:
   test:
-    if: github.event.pull_request.draft == false || (github.event.action == 'labeled' && github.event.label.name == 'testing')
+    if: github.event.pull_request.draft == false ||
+      (github.event.action == 'labeled' && github.event.label.name == 'testing')
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        go-version: [1.24.x]
+        go-version: ['1.24.5', '1.24.4']
+
     steps:
       - uses: actions/setup-go@v5
         with:
@@ -18,31 +20,41 @@ jobs:
 
       - uses: actions/checkout@v4
 
-      - uses: actions/cache@v4
+      - name: Cache Go modules
+        uses: actions/cache@v4
         with:
           path: |
             ~/go/pkg/mod
             ~/.cache/go-build
-          key: ${{ runner.os }}-go-${{ hashFiles('**/go.sum') }}
+          key: ${{ runner.os }}-go-${{ matrix.go-version }}-${{ hashFiles('go.sum') }}
           restore-keys: |
-            ${{ runner.os }}-go-
+            ${{ runner.os }}-go-${{ matrix.go-version }}-
+
+      - name: Download Go modules
+        run: go mod download
 
       - name: Run pkg tests
         run: |
-          go test ./pkg/... -coverprofile=coverage.out
-          go tool cover -func=coverage.out | tail -n 1
+          go test -coverpkg=./... ./pkg/... -coverprofile=coverage-pkg-${{ matrix.go-version }}.out
+          go tool cover -func=coverage-pkg-${{ matrix.go-version }}.out | tail -n 1
 
       - name: Run boost & env tests
         run: |
-          go test ./boost ./env -coverprofile=coverage.out
-          go tool cover -func=coverage.out | tail -n 1
+          go test -coverpkg=./... ./boost ./env -coverprofile=coverage-boost-env-${{ matrix.go-version }}.out
+          go tool cover -func=coverage-boost-env-${{ matrix.go-version }}.out | tail -n 1
 
       - name: Run handlers tests
         run: |
-          go test ./handler/... -coverprofile=coverage.out
-          go tool cover -func=coverage.out | tail -n 1
+          go test -coverpkg=./... ./handler/... -coverprofile=coverage-handler-${{ matrix.go-version }}.out
+          go tool cover -func=coverage-handler-${{ matrix.go-version }}.out | tail -n 1
 
       - name: Run database tests
         run: |
-          go test ./database/... -coverprofile=coverage.out
-          go tool cover -func=coverage.out | tail -n 1
+          go test -coverpkg=./... ./database/... -coverprofile=coverage-database-${{ matrix.go-version }}.out
+          go tool cover -func=coverage-database-${{ matrix.go-version }}.out | tail -n 1
+
+      - name: Merge coverage reports
+        run: |
+          echo "mode: set" > coverage-${{ matrix.go-version }}.out
+          tail -q -n +2 coverage-*-${{ matrix.go-version }}.out >> coverage-${{ matrix.go-version }}.out
+          go tool cover -func=coverage-${{ matrix.go-version }}.out | tail -n 1
diff --git a/database/model_internal_test.go b/database/model_internal_test.go
index 2fabf46b..728cb714 100644
--- a/database/model_internal_test.go
+++ b/database/model_internal_test.go
@@ -1,6 +1,9 @@
 package database
 
-import "testing"
+import (
+	"strings"
+	"testing"
+)
 
 func TestIsValidTable(t *testing.T) {
 	if !isValidTable("users") {
@@ -10,3 +13,22 @@ func TestIsValidTable(t *testing.T) {
 		t.Fatalf("unexpected valid table")
 	}
 }
+
+func TestIsValidTableEdgeCases(t *testing.T) {
+	invalid := []string{
+		"",
+		"user!@#",
+		"user-name",
+		"Users",
+		"USERS",
+		"table123",
+		strings.Repeat("x", 256),
+		"   ",
+	}
+
+	for _, name := range invalid {
+		if isValidTable(name) {
+			t.Fatalf("%q should be invalid", name)
+		}
+	}
+}